@article{2919, abstract = {The distribution of the phytohormone auxin regulates many aspects of plant development including growth response to gravity. Gravitropic root curvature involves coordinated and asymmetric cell elongation between the lower and upper side of the root, mediated by differential cellular auxin levels. The asymmetry in the auxin distribution is established and maintained by a spatio-temporal regulation of the PIN-FORMED (PIN) auxin transporter activity. We provide novel insights into the complex regulation of PIN abundance and activity during root gravitropism. We show that PIN2 turnover is differentially regulated on the upper and lower side of gravistimulated roots by distinct but partially overlapping auxin feedback mechanisms. In addition to regulating transcription and clathrin-mediated internalization, auxin also controls PIN abundance at the plasma membrane by promoting their vacuolar targeting and degradation. This effect of elevated auxin levels requires the activity of SKP-Cullin-F-box TIR1/AFB (SCF TIR1/AFB)-dependent pathway. Importantly, also suboptimal auxin levels mediate PIN degradation utilizing the same signalling pathway. These feedback mechanisms are functionally important during gravitropic response and ensure fine-tuning of auxin fluxes for maintaining as well as terminating asymmetric growth.}, author = {Baster, Pawel and Robert, Stéphanie and Kleine Vehn, Jürgen and Vanneste, Steffen and Kania, Urszula and Grunewald, Wim and De Rybel, Bert and Beeckman, Tom and Friml, Jirí}, journal = {EMBO Journal}, number = {2}, pages = {260 -- 274}, publisher = {Wiley-Blackwell}, title = {{SCF^TIR1 AFB-auxin signalling regulates PIN vacuolar trafficking and auxin fluxes during root gravitropism}}, doi = {10.1038/emboj.2012.310}, volume = {32}, year = {2013}, } @article{2920, abstract = {Cell polarisation in development is a common and fundamental process underlying embryo patterning and morphogenesis, and has been extensively studied over the past years. Our current knowledge of cell polarisation in development is predominantly based on studies that have analysed polarisation of single cells, such as eggs, or cellular aggregates with a stable polarising interface, such as cultured epithelial cells (St Johnston and Ahringer, 2010). However, in embryonic development, particularly of vertebrates, cell polarisation processes often encompass large numbers of cells that are placed within moving and proliferating tissues, and undergo mesenchymal-to-epithelial transitions with a highly complex spatiotemporal choreography. How such intricate cell polarisation processes in embryonic development are achieved has only started to be analysed. By using live imaging of neurulation in the transparent zebrafish embryo, Buckley et al (2012) now describe a novel polarisation strategy by which cells assemble an apical domain in the part of their cell body that intersects with the midline of the forming neural rod. This mechanism, along with the previously described mirror-symmetric divisions (Tawk et al, 2007), is thought to trigger formation of both neural rod midline and lumen.}, author = {Compagnon, Julien and Heisenberg, Carl-Philipp J}, journal = {EMBO Journal}, number = {1}, pages = {1 -- 3}, publisher = {Wiley-Blackwell}, title = {{Neurulation coordinating cell polarisation and lumen formation}}, doi = {10.1038/emboj.2012.325}, volume = {32}, year = {2013}, } @inproceedings{2940, abstract = {A chain rule for an entropy notion H(.) states that the entropy H(X) of a variable X decreases by at most l if conditioned on an l-bit string A, i.e., H(X|A)>= H(X)-l. More generally, it satisfies a chain rule for conditional entropy if H(X|Y,A)>= H(X|Y)-l. All natural information theoretic entropy notions we are aware of (like Shannon or min-entropy) satisfy some kind of chain rule for conditional entropy. Moreover, many computational entropy notions (like Yao entropy, unpredictability entropy and several variants of HILL entropy) satisfy the chain rule for conditional entropy, though here not only the quantity decreases by l, but also the quality of the entropy decreases exponentially in l. However, for the standard notion of conditional HILL entropy (the computational equivalent of min-entropy) the existence of such a rule was unknown so far. In this paper, we prove that for conditional HILL entropy no meaningful chain rule exists, assuming the existence of one-way permutations: there exist distributions X,Y,A, where A is a distribution over a single bit, but $H(X|Y)>>H(X|Y,A)$, even if we simultaneously allow for a massive degradation in the quality of the entropy. The idea underlying our construction is based on a surprising connection between the chain rule for HILL entropy and deniable encryption. }, author = {Krenn, Stephan and Pietrzak, Krzysztof Z and Wadia, Akshay}, editor = {Sahai, Amit}, location = {Tokyo, Japan}, pages = {23 -- 39}, publisher = {Springer}, title = {{A counterexample to the chain rule for conditional HILL entropy, and what deniable encryption has to do with it}}, doi = {10.1007/978-3-642-36594-2_2}, volume = {7785}, year = {2013}, } @inproceedings{2948, abstract = {Many visual datasets are traditionally used to analyze the performance of different learning techniques. The evaluation is usually done within each dataset, therefore it is questionable if such results are a reliable indicator of true generalization ability. We propose here an algorithm to exploit the existing data resources when learning on a new multiclass problem. Our main idea is to identify an image representation that decomposes orthogonally into two subspaces: a part specific to each dataset, and a part generic to, and therefore shared between, all the considered source sets. This allows us to use the generic representation as un-biased reference knowledge for a novel classification task. By casting the method in the multi-view setting, we also make it possible to use different features for different databases. We call the algorithm MUST, Multitask Unaligned Shared knowledge Transfer. Through extensive experiments on five public datasets, we show that MUST consistently improves the cross-datasets generalization performance.}, author = {Tommasi, Tatiana and Quadrianto, Novi and Caputo, Barbara and Lampert, Christoph}, location = {Daejeon, Korea}, pages = {1 -- 15}, publisher = {Springer}, title = {{Beyond dataset bias: Multi-task unaligned shared knowledge transfer}}, doi = {10.1007/978-3-642-37331-2_1}, volume = {7724}, year = {2013}, } @inproceedings{2973, abstract = {Efficient zero-knowledge proofs of knowledge (ZK-PoK) are basic building blocks of many practical cryptographic applications such as identification schemes, group signatures, and secure multiparty computation. Currently, first applications that critically rely on ZK-PoKs are being deployed in the real world. The most prominent example is Direct Anonymous Attestation (DAA), which was adopted by the Trusted Computing Group (TCG) and implemented as one of the functionalities of the cryptographic Trusted Platform Module (TPM) chip. Implementing systems using ZK-PoK turns out to be challenging, since ZK-PoK are, loosely speaking, significantly more complex than standard crypto primitives, such as encryption and signature schemes. As a result, implementation cycles of ZK-PoK are time-consuming and error-prone, in particular for developers with minor or no cryptographic skills. In this paper we report on our ongoing and future research vision with the goal to bring ZK-PoK to practice by making them accessible to crypto and security engineers. To this end we are developing compilers and related tools that support and partially automate the design, implementation, verification and secure implementation of ZK-PoK protocols.}, author = {Bangerter, Endre and Barzan, Stefania and Stephan Krenn and Sadeghi, Ahmad-Reza and Schneider, Thomas and Tsay, Joe-Kai}, editor = {Christianson, Bruce and Malcolm, James A. and Matyas, Vashek and Roe, Michael}, pages = {51 -- 62}, publisher = {Springer}, title = {{Bringing Zero-Knowledge Proofs of Knowledge to Practice}}, doi = {10.1007/978-3-642-36213-2_9}, volume = {7028}, year = {2013}, } @article{3116, abstract = {Multithreaded programs coordinate their interaction through synchronization primitives like mutexes and semaphores, which are managed by an OS-provided resource manager. We propose algorithms for the automatic construction of code-aware resource managers for multithreaded embedded applications. Such managers use knowledge about the structure and resource usage (mutex and semaphore usage) of the threads to guarantee deadlock freedom and progress while managing resources in an efficient way. Our algorithms compute managers as winning strategies in certain infinite games, and produce a compact code description of these strategies. We have implemented the algorithms in the tool Cynthesis. Given a multithreaded program in C, the tool produces C code implementing a code-aware resource manager. We show in experiments that Cynthesis produces compact resource managers within a few minutes on a set of embedded benchmarks with up to 6 threads. © 2012 Springer Science+Business Media, LLC.}, author = {Chatterjee, Krishnendu and De Alfaro, Luca and Faella, Marco and Majumdar, Ritankar and Raman, Vishwanath}, journal = {Formal Methods in System Design}, number = {2}, pages = {142 -- 174}, publisher = {Springer}, title = {{Code aware resource management}}, doi = {10.1007/s10703-012-0170-4}, volume = {42}, year = {2013}, } @article{2815, abstract = {The fact that a sum of isotropic Gaussian kernels can have more modes than kernels is surprising. Extra (ghost) modes do not exist in ℝ1 and are generally not well studied in higher dimensions. We study a configuration of n+1 Gaussian kernels for which there are exactly n+2 modes. We show that all modes lie on a finite set of lines, which we call axes, and study the restriction of the Gaussian mixture to these axes in order to discover that there are an exponential number of critical points in this configuration. Although the existence of ghost modes remained unknown due to the difficulty of finding examples in ℝ2, we show that the resilience of ghost modes grows like the square root of the dimension. In addition, we exhibit finite configurations of isotropic Gaussian kernels with superlinearly many modes.}, author = {Edelsbrunner, Herbert and Fasy, Brittany Terese and Rote, Günter}, issn = {1432-0444}, journal = {Discrete & Computational Geometry}, number = {4}, pages = {797 -- 822}, publisher = {Springer}, title = {{Add isotropic Gaussian kernels at own risk: More and more resilient modes in higher dimensions}}, doi = {10.1007/s00454-013-9517-x}, volume = {49}, year = {2013}, } @article{2939, abstract = {In this paper, we present the first output-sensitive algorithm to compute the persistence diagram of a filtered simplicial complex. For any Γ > 0, it returns only those homology classes with persistence at least Γ. Instead of the classical reduction via column operations, our algorithm performs rank computations on submatrices of the boundary matrix. For an arbitrary constant δ ∈ (0, 1), the running time is O (C (1 - δ) Γ R d (n) log n), where C (1 - δ) Γ is the number of homology classes with persistence at least (1 - δ) Γ, n is the total number of simplices in the complex, d its dimension, and R d (n) is the complexity of computing the rank of an n × n matrix with O (d n) nonzero entries. Depending on the choice of the rank algorithm, this yields a deterministic O (C (1 - δ) Γ n 2.376) algorithm, an O (C (1 - δ) Γ n 2.28) Las-Vegas algorithm, or an O (C (1 - δ) Γ n 2 + ε{lunate}) Monte-Carlo algorithm for an arbitrary ε{lunate} > 0. The space complexity of the Monte-Carlo version is bounded by O (d n) = O (n log n).}, author = {Chen, Chao and Kerber, Michael}, journal = {Computational Geometry: Theory and Applications}, number = {4}, pages = {435 -- 447}, publisher = {Elsevier}, title = {{An output sensitive algorithm for persistent homology}}, doi = {10.1016/j.comgeo.2012.02.010}, volume = {46}, year = {2013}, } @article{344, abstract = {Copper-based selenides are attracting increasing interest due to their outstanding optoelectronic and thermoelectric properties. Herein a novel colloidal synthetic route to prepare Cu2SnSe3 nanocrystals with controlled size, shape and composition is presented. The high yield of the developed procedure allowed its up-scaling to the production of grams of colloidal Cu2SnSe3 nanocrystals. These nanocrystals were used as building blocks for the production of Cu2SnSe3 bulk nanostructured materials by spark plasma sintering. The thermoelectric properties of the prepared nanocrystalline Cu2SnSe3 pellets were characterized in the temperature range from 300 to 720 K. The obtained results show the bottom-up production of nanocrystalline materials from solution-processed nanocrystals to be a potentially advantageous alternative to conventional methods of production of efficient thermoelectric materials.}, author = {Ibáñez, Maria and Cadavid, Doris and Anselmi Tamburini, Umberto and Zamani, Reza and Gorsse, Stéphane and Li, Wenhua and López, Antonio and Morante, Joan and Arbiol, Jordi and Cabot, Andreu}, journal = {Journal of Materials Chemistry A}, number = {4}, pages = {1421 -- 1426}, publisher = {Royal Society of Chemistry}, title = {{Colloidal synthesis and thermoelectric properties of Cu 2SnSe3 nanocrystals}}, doi = {10.1039/C2TA00419D}, volume = {1}, year = {2013}, } @article{352, abstract = {The presence of organic ligands on the surface of colloidal nanoparticles strongly limits their performance in technological applications where charge carrier transfer/transport plays an important role. We use metal salts, matched with the nanoparticle composition, to eliminate the surface organic ligands without introducing extrinsic impurities in the final nanomaterial. The potential of the simple, general and scalable processes presented here is demonstrated by characterizing the thermoelectric properties of nanostructured Ag2Te produced by the bottom up assembly of Ag2Te nanocrystals. A 6-fold increase of the thermoelectric figure of merit of Ag2Te was obtained when organic ligands were displaced by AgNO3. The same procedure can enhance the performance of nanocrystals and nanocrystal-based devices in a broad range of applications, from photovoltaics and thermoelectrics to catalysis.}, author = {Cadavid, Doris and Ibáñez, Maria and Shavel, Alexey and Durá, Oscar and López De La Torre, Marco and Cabot, Andreu}, journal = {Journal of Materials Chemistry A}, number = {15}, pages = {4864 -- 4870}, publisher = {Royal Society of Chemistry}, title = {{Organic ligand displacement by metal salts to enhance nanoparticle functionality: Thermoelectric properties of Ag inf 2 inf Te}}, doi = {10.1039/C3TA01455J}, volume = {1}, year = {2013}, } @article{378, abstract = {Until recently, to prepare nanocrystals of a new material, scientists searched their shelves for the appropriate molecular precursors, surfactants, and solvents. They then optimized the reaction conditions for the atoms to self-assemble into monodisperse nanocrystals (1). This approach is being replaced by a simpler strategy, in which preformed nanocrystals serve as templates to produce nanoparticles with a different composition through chemical transformation. On page 964 of this issue, Oh et al. (2) report a powerful mechanism that allows the composition of oxide nanoparticles to be transformed in solution and at low temperatures.}, author = {Ibáñez, Maria and Cabot, Andreu}, journal = {Science}, number = {6135}, pages = {935 -- 936}, publisher = {American Association for the Advancement of Science}, title = {{All change for nanocrystals}}, doi = {10.1126/science.1239221}, volume = {340}, year = {2013}, } @article{3261, abstract = {Cells in a developing embryo have no direct way of "measuring" their physical position. Through a variety of processes, however, the expression levels of multiple genes come to be correlated with position, and these expression levels thus form a code for "positional information." We show how to measure this information, in bits, using the gap genes in the Drosophila embryo as an example. Individual genes carry nearly two bits of information, twice as much as expected if the expression patterns consisted only of on/off domains separated by sharp boundaries. Taken together, four gap genes carry enough information to define a cell's location with an error bar of ~1% along the anterior-posterior axis of the embryo. This precision is nearly enough for each cell to have a unique identity, which is the maximum information the system can use, and is nearly constant along the length of the embryo. We argue that this constancy is a signature of optimality in the transmission of information from primary morphogen inputs to the output of the gap gene network.}, author = {Dubuis, Julien and Tkacik, Gasper and Wieschaus, Eric and Gregor, Thomas and Bialek, William}, journal = {PNAS}, number = {41}, pages = {16301 -- 16308}, publisher = {National Academy of Sciences}, title = {{Positional information, in bits}}, doi = {10.1073/pnas.1315642110}, volume = {110}, year = {2013}, } @article{331, abstract = {We report a procedure to prepare highly monodisperse copper telluride nanocubes, nanoplates, and nanorods. The procedure is based on the reaction of a copper salt with trioctylphosphine telluride in the presence of lithium bis(trimethylsilyl)amide and oleylamine. CuTe nanocrystals display a strong near-infrared optical absorption associated with localized surface plasmon resonances. We exploit this plasmon resonance for the design of surface-enhanced Raman scattering sensors for unconventional optical probes. Furthermore, we also report here our preliminary analysis of the use of CuTe nanocrystals as cytotoxic and photothermal agents.}, author = {Li, Wenhua and Zamani, Reza and Rivera Gil, Pilar and Pelaz, Beatriz and Ibáñez, Maria and Cadavid, Doris and Shavel, Alexey and Alvarez Puebla, Ramon and Parak, Wolfgang and Arbiol, Jordi and Cabot, Andreu}, journal = {Journal of the American Chemical Society}, number = {19}, pages = {7098 -- 7101}, publisher = {ACS}, title = {{CuTe nanocrystals: Shape and size control, plasmonic properties, and use as SERS probes and photothermal agents}}, doi = {10.1021/ja401428e}, volume = {135}, year = {2013}, } @misc{3321, author = {Quadrianto, Novi and Lampert, Christoph}, booktitle = {Encyclopedia of Systems Biology}, editor = {Dubitzky, Werner and Wolkenhauer, Olaf and Cho, Kwang and Yokota, Hiroki}, pages = {1069 -- 1069}, publisher = {Springer}, title = {{Kernel based learning}}, doi = {10.1007/978-1-4419-9863-7_604}, volume = {3}, year = {2013}, } @article{2831, abstract = {We consider Markov decision processes (MDPs) with Büchi (liveness) objectives. We consider the problem of computing the set of almost-sure winning states from where the objective can be ensured with probability 1. Our contributions are as follows: First, we present the first subquadratic symbolic algorithm to compute the almost-sure winning set for MDPs with Büchi objectives; our algorithm takes O(n · √ m) symbolic steps as compared to the previous known algorithm that takes O(n 2) symbolic steps, where n is the number of states and m is the number of edges of the MDP. In practice MDPs have constant out-degree, and then our symbolic algorithm takes O(n · √ n) symbolic steps, as compared to the previous known O(n 2) symbolic steps algorithm. Second, we present a new algorithm, namely win-lose algorithm, with the following two properties: (a) the algorithm iteratively computes subsets of the almost-sure winning set and its complement, as compared to all previous algorithms that discover the almost-sure winning set upon termination; and (b) requires O(n · √ K) symbolic steps, where K is the maximal number of edges of strongly connected components (scc's) of the MDP. The win-lose algorithm requires symbolic computation of scc's. Third, we improve the algorithm for symbolic scc computation; the previous known algorithm takes linear symbolic steps, and our new algorithm improves the constants associated with the linear number of steps. In the worst case the previous known algorithm takes 5×n symbolic steps, whereas our new algorithm takes 4×n symbolic steps.}, author = {Chatterjee, Krishnendu and Henzinger, Monika H and Joglekar, Manas and Shah, Nisarg}, journal = {Formal Methods in System Design}, number = {3}, pages = {301 -- 327}, publisher = {Springer}, title = {{Symbolic algorithms for qualitative analysis of Markov decision processes with Büchi objectives}}, doi = {10.1007/s10703-012-0180-2}, volume = {42}, year = {2013}, } @article{342, abstract = {Morphology is a key parameter in the design of novel nanocrystals and nanomaterials with controlled functional properties. Here, we demonstrate the potential of foreign metal ions to tune the morphology of colloidal semiconductor nanoparticles. We illustrate the underlying mechanism by preparing copper selenide nanocubes in the presence of Al ions. We further characterize the plasmonic properties of the obtained nanocrystals and demonstrate their potential as a platform to produce cubic nanoparticles with different composition by cation exchange. © 2013 American Chemical Society.}, author = {Li, Wenhua and Zamani, Reza and Ibáñez, Maria and Cadavid, Doris and Shavel, Alexey and Morante, Joan and Arbiol, Jordi and Cabot, Andreu}, journal = {Journal of the American Chemical Society}, number = {12}, pages = {4664 -- 4667}, publisher = {American Chemical Society}, title = {{Metal ions to control the morphology of semiconductor nanoparticles: Copper selenide nanocubes}}, doi = {10.1021/ja400472m}, volume = {135}, year = {2013}, } @article{343, abstract = {The bottom-up assembly of nanocrystals provides access to a three-dimensional composition control at the nanoscale not attainable by any other technology. In particular, colloidal nanoheterostructures, with intrinsic multiphase organization, are especially appealing building blocks for the bottom-up production of nanocomposites. In the present work, we use PbTe-PbS as the model material system and thermoelectricity as the paradigmatic application to investigate the potential of the bottom-up assembly of core-shell nanoparticles to produce functional nanocomposites. With this goal in mind, a rapid, high-yield and scalable colloidal synthetic route to prepare grams of PbTe@PbS core-shell nanoparticles with unprecedented narrow size distributions and exceptional composition control is detailed. PbTe@PbS nanoparticles were used as building blocks for the bottom-up production of PbTe-PbS nanocomposites with tuned composition. In such PbTe-PbS nanocomposites, synergistic nanocrystal doping effects result in up to 10-fold higher electrical conductivities than in pure PbTe and PbS nanomaterials. At the same time, the acoustic impedance mismatch between PbTe and PbS phases and a partial phase alloying provide PbTe-PbS nanocomposites with strongly reduced thermal conductivities. As a result, record thermoelectric figures of merit (ZT) of ∼1.1 were obtained from undoped PbTe and PbS phases at 710 K. These high ZT values prove the potential of the proposed processes to produce efficient functional nanomaterials with programmable properties. © 2013 American Chemical Society.}, author = {Ibáñez, Maria and Zamani, Reza and Gorsse, Stéphane and Fan, Jiandong and Ortega, Silvia and Cadavid, Doris and Morante, Joan and Arbiol, Jordi and Cabot, Andreu}, journal = {ACS Nano}, number = {3}, pages = {2573 -- 2586}, publisher = {American Chemical Society}, title = {{Core shell nanoparticles as building blocks for the bottom-up production of functional nanocomposites: PbTe PbS thermoelectric properties}}, doi = {10.1021/nn305971v}, volume = {7}, year = {2013}, } @article{351, abstract = {A multistrategy approach to overcome the main challenges of nanoparticle-based solution-processed Cu2ZnSnSe4 thin film solar cells is presented. We developed an efficient ligand exchange strategy, using an antimony salt, to displace organic ligands from the surface of Cu 2ZnSnS4 nanoparticles. An automated pulsed spray-deposition system was used to deposit the nanoparticles into homogeneous and crack-free films with controlled thickness. After annealing the film in a Se-rich atmosphere, carbon-free and crystalline Cu2ZnSnSe4 absorber layers were obtained. Not only was crystallization promoted by the complete removal of organics, but also Sb itself played a critical role. The Sb-assisted crystal growth is associated with the formation of a Sb-based compound at the grain boundaries, which locally reduces the melting point, thus promoting the film diffusion-limited crystallization. }, author = {Carrete, Alex and Shavel, Alexey and Fontané, Xavier and Montserrat, Joana and Fan, Jiandong and Ibáñez, Maria and Saucedo, Edgardo and Pérez Rodríguez, Alejandro and Cabot, Andreu}, journal = {Journal of the American Chemical Society}, number = {43}, pages = {15982 -- 15985}, publisher = {American Chemical Society}, title = {{Antimony-based ligand exchange to promote crystallization in spray-deposited Cu2ZnSnSe4 solar cells}}, doi = {10.1021/ja4068639}, volume = {135}, year = {2013}, } @article{353, abstract = {We report a procedure to prepare highly monodisperse copper telluride nanocubes, nanoplates, and nanorods. The procedure is based on the reaction of a copper salt with trioctylphosphine telluride in the presence of lithium bis(trimethylsilyl)amide and oleylamine. CuTe nanocrystals display a strong near-infrared optical absorption associated with localized surface plasmon resonances. We exploit this plasmon resonance for the design of surface-enhanced Raman scattering sensors for unconventional optical probes. Furthermore, we also report here our preliminary analysis of the use of CuTe nanocrystals as cytotoxic and photothermal agents.}, author = {Li, Wenhua and Zamani, Reza and Rivera Gil, Pilar and Pelaz, Beatriz and Ibáñez, Maria and Cadavid, Doris and Shavel, Alexey and Alvarez Puebla, Ramon and Parak, Wolfgang and Arbiol, Jordi and Cabot, Andreu}, journal = {Journal of the American Chemical Society}, number = {19}, pages = {7098 -- 7101}, publisher = {American Chemical Society}, title = {{CuTe nanocrystals: Shape and size control, plasmonic properties, and use as SERS probes and photothermal agents}}, doi = {10.1021/ja401428e}, volume = {135}, year = {2013}, } @article{376, abstract = {The compositional versatility of I2–II–IV–VI4 tetrahedrally-coordinated compounds allows for accommodating their functional properties to numerous technological applications. Among them, Cu2ZnSnSe4 is an emerging photovoltaic material and Cu2CdSnSe4 displays excellent thermoelectric properties. The third compound of this family, Cu2HgSnSe4, remains relatively unexplored. Herein, a synthetic route to produce Cu2HgSnSe4 nanoparticles with narrow size distribution and controlled composition is presented. Cu2HgSnSe4 nanoparticles were subsequently used as building blocks to produce bulk nanocrystalline materials, whose thermoelectric properties were analyzed. A very preliminary adjustment of the material composition yielded Seebeck coefficients up to 160 μV K−1, electrical conductivities close to 104 S m−1 and thermal conductivities down to 0.5 W m−1 K−1.}, author = {Li, Wenhua and Ibáñez, Maria and Zamani, Reza and García Castelló, Nuria and Stéphane, Grosse and Cadavid, Doris and Prades, Joan and Arbiol, Jordi and Cabot, Andreu}, journal = {CrystEngComm}, pages = {8966 -- 8971}, publisher = {Royal Society of Chemistry}, title = {{Cu2HgSnSe4 nanoparticles: synthesis and thermoelectric properties}}, doi = {10.1039/C3CE41583J}, volume = {44}, year = {2013}, }