Search Results - "ALIVISATOS, A. Paul"

Essentially Trap-Free CsPbBr3 Colloidal Nanocrystals by Postsynthetic Thiocyanate Surface Treatment by Koscher, Brent A, Swabeck, Joseph K, Bronstein, Noah D, Alivisatos, A. Paul

“…We demonstrate postsynthetic modification of CsPbBr3 nanocrystals by a thiocyanate salt treatment. This treatment improves the quantum yield of both freshly…”
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Thermochromic halide perovskite solar cells by Lin, Jia, Lai, Minliang, Dou, Letian, Kley, Christopher S., Chen, Hong, Peng, Fei, Sun, Junliang, Lu, Dylan, Hawks, Steven A., Xie, Chenlu, Cui, Fan, Alivisatos, A. Paul, Limmer, David T., Yang, Peidong

“…Smart photovoltaic windows represent a promising green technology featuring tunable transparency and electrical power generation under external stimuli to…”
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Three-Dimensional Plasmon Rulers by Liu, Na, Hentschel, Mario, Weiss, Thomas, Alivisatos, A. Paul, Giessen, Harald

“…Plasmon rulers can be used to determine nanoscale distances within chemical or biological species. They are based on the spectral shift of the scattering…”
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Surface- vs Diffusion-Limited Mechanisms of Anion Exchange in CsPbBr3 Nanocrystal Cubes Revealed through Kinetic Studies by Koscher, Brent A, Bronstein, Noah D, Olshansky, Jacob H, Bekenstein, Yehonadav, Alivisatos, A. Paul

“…Ion-exchange transformations allow access to nanocrystalline materials with compositions that are inaccessible via direct synthetic routes. However, additional…”
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Precise Tuning of Surface Quenching for Luminescence Enhancement in Core–Shell Lanthanide-Doped Nanocrystals by Fischer, Stefan, Bronstein, Noah D, Swabeck, Joseph K, Chan, Emory M, Alivisatos, A. Paul

“…Lanthanide-doped nanocrystals are of particular interest for the research community not only due to their ability to shape light by downshifting, quantum…”
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Quantum Yields, Surface Quenching, and Passivation Efficiency for Ultrasmall Core/Shell Upconverting Nanoparticles by Würth, Christian, Fischer, Stefan, Grauel, Bettina, Alivisatos, A. Paul, Resch-Genger, Ute

“…We synthesized and characterized a set of ultrasmall hexagonal-phase NaGdF4: 20% Yb3+, 2% Er3+ upconversion nanoparticles with core diameters of 3.7 ± 0.5 nm…”
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Excitation-wavelength-dependent small polaron trapping of photoexcited carriers in α-Fe2O3 by Carneiro, Lucas M., Cushing, Scott K., Liu, Chong, Su, Yude, Yang, Peidong, Alivisatos, A. Paul, Leone, Stephen R.

“…Small polaron formation is known to limit ground-state mobilities in metal oxide photocatalysts. However, the role of small polaron formation in the…”
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Ultrathin Colloidal Cesium Lead Halide Perovskite Nanowires by Zhang, Dandan, Yu, Yi, Bekenstein, Yehonadav, Wong, Andrew B, Alivisatos, A. Paul, Yang, Peidong

“…Highly uniform single crystal ultrathin CsPbBr3 nanowires (NWs) with diameter of 2.2 ± 0.2 nm and length up to several microns were successfully synthesized…”
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High-Resolution EM of Colloidal Nanocrystal Growth Using Graphene Liquid Cells by Yuk, Jong Min, Park, Jungwon, Ercius, Peter, Kim, Kwanpyo, Hellebusch, Daniel J., Crommie, Michael F., Lee, Jeong Yong, Zettl, A., Alivisatos, A. Paul

“…We introduce a new type of liquid cell for in situ transmission electron microscopy (TEM) based on entrapment of a liquid film between layers of graphene. The…”
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Ligand Mediated Transformation of Cesium Lead Bromide Perovskite Nanocrystals to Lead Depleted Cs4PbBr6 Nanocrystals by Liu, Zeke, Bekenstein, Yehonadav, Ye, Xingchen, Nguyen, Son C, Swabeck, Joseph, Zhang, Dandan, Lee, Shuit-Tong, Yang, Peidong, Ma, Wanli, Alivisatos, A. Paul

“…Lead halide perovskite nanocrystals (NCs) have emerged as attractive nanomaterials owing to their excellent optical and optoelectronic properties. Their…”
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The Making and Breaking of Lead-Free Double Perovskite Nanocrystals of Cesium Silver–Bismuth Halide Compositions by Bekenstein, Yehonadav, Dahl, Jakob C, Huang, Jianmei, Osowiecki, Wojciech T, Swabeck, Joseph K, Chan, Emory M, Yang, Peidong, Alivisatos, A. Paul

“…Replacing lead in halide perovskites is of great interest due to concerns about stability and toxicity. Recently, lead free double perovskites in which the…”
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The Brain Activity Map Project and the Challenge of Functional Connectomics by Alivisatos, A. Paul, Chun, Miyoung, Church, George M., Greenspan, Ralph J., Roukes, Michael L., Yuste, Rafael

“…The function of neural circuits is an emergent property that arises from the coordinated activity of large numbers of neurons. To capture this, we propose…”
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Redefining near-unity luminescence in quantum dots with photothermal threshold quantum yield by Hanifi, David A, Bronstein, Noah D, Koscher, Brent A, Nett, Zach, Swabeck, Joseph K, Takano, Kaori, Schwartzberg, Adam M, Maserati, Lorenzo, Vandewal, Koen, van de Burgt, Yoeri, Salleo, Alberto, Alivisatos, A Paul

“…A variety of optical applications rely on the absorption and reemission of light. The quantum yield of this process often plays an essential role. When the…”
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Materials Availability Expands the Opportunity for Large-Scale Photovoltaics Deployment by Wadia, Cyrus, Alivisatos, A. Paul, Kammen, Daniel M

“…Solar photovoltaics have great promise for a low-carbon future but remain expensive relative to other technologies. Greatly increased penetration of…”
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Cation Exchange Reactions in Ionic Nanocrystals by Son, Dong Hee, Hughes, Steven M., Yin, Yadong, Alivisatos, A. Paul

“…Cation exchange has been investigated in a wide range of nanocrystals of varying composition, size, and shape. Complete and fully reversible exchange occurs,…”
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Pyramidal and Chiral Groupings of Gold Nanocrystals Assembled Using DNA Scaffolds by Mastroianni, Alexander J, Claridge, Shelley A, Alivisatos, A. Paul

“…Nanostructures constructed from metal and semiconductor nanocrystals conjugated to and organized by DNA are an emerging class of materials with collective…”
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Observation of Single Colloidal Platinum Nanocrystal Growth Trajectories by Zheng, Haimei, Smith, Rachel K, Jun, Young-wook, Kisielowski, Christian, Dahmen, Ulrich, Alivisatos, A. Paul

“…Understanding of colloidal nanocrystal growth mechanisms is essential for the syntheses of nanocrystals with desired physical properties. The classical model…”
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Ferroelectric order in individual nanometre-scale crystals by Polking, Mark J., Han, Myung-Geun, Yourdkhani, Amin, Petkov, Valeri, Kisielowski, Christian F., Volkov, Vyacheslav V., Zhu, Yimei, Caruntu, Gabriel, Paul Alivisatos, A., Ramesh, Ramamoorthy

“…Ferroelectricity in finite-dimensional systems continues to arouse interest, motivated by predictions of vortex polarization states and the utility of…”
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Synthesis of Composition Tunable and Highly Luminescent Cesium Lead Halide Nanowires through Anion-Exchange Reactions by Zhang, Dandan, Yang, Yiming, Bekenstein, Yehonadav, Yu, Yi, Gibson, Natalie A, Wong, Andrew B, Eaton, Samuel W, Kornienko, Nikolay, Kong, Qiao, Lai, Minliang, Alivisatos, A. Paul, Leone, Stephen R, Yang, Peidong

“…Here, we demonstrate the successful synthesis of brightly emitting colloidal cesium lead halide (CsPbX3, X = Cl, Br, I) nanowires (NWs) with uniform diameters…”
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Observation of ordered organic capping ligands on semiconducting quantum dots via powder X-ray diffraction by Calvin, Jason J., Kaufman, Tierni M., Sedlak, Adam B., Crook, Michelle F., Alivisatos, A. Paul

“…Powder X-ray diffraction is one of the key techniques used to characterize the inorganic structure of colloidal nanocrystals. The comparatively low scattering…”
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