Search Results - "Sergei A. Ivanov"

Single-exciton optical gain in semiconductor nanocrystals by Bezel, Ilya, Nanda, Jagjit, Klimov, Victor I, Ivanov, Sergei A, Piryatinski, Andrei, McGuire, John A, Achermann, Marc

“…Nanocrystal quantum dots have favourable light-emitting properties. They show photoluminescence with high quantum yields, and their emission colours depend on…”
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Type-II Core/Shell CdS/ZnSe Nanocrystals:  Synthesis, Electronic Structures, and Spectroscopic Properties by Ivanov, Sergei A, Piryatinski, Andrei, Nanda, Jagjit, Tretiak, Sergei, Zavadil, Kevin R, Wallace, William O, Werder, Don, Klimov, Victor I

“…We report a two-step synthesis of highly luminescent CdS/ZnSe core/shell nanocrystals (emission quantum yields up to 50%) that can produce efficient spatial…”
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Effect of Quantum and Dielectric Confinement on the Exciton−Exciton Interaction Energy in Type II Core/Shell Semiconductor Nanocrystals by Piryatinski, Andrei, Ivanov, Sergei A, Tretiak, Sergei, Klimov, Victor I

“…We study theoretically two electron−hole pair states (biexcitons) in core/shell hetero-nanocrystals with type II alignment of energy states, which promotes…”
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Manufacturing of Complex Silicon–Carbon Structures: Exploring SixCy Materials by Oglesby, Skyler, Ivanov, Sergei A., Londonõ-Calderon, Alejandra, Pete, Douglas, Pettes, Michael Thompson, Jones, Andrew Crandall, Chabi, Sakineh

“…This paper reports on the manufacturing of complex three-dimensional Si/C structures via a chemical vapor deposition method. The structure and properties of…”
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Density Functional Analysis of Geometries and Electronic Structures of Gold-Phosphine Clusters. The Case of Au4(PR3)42+ and Au4( Delta m2-I)2(PR3)4 by Ivanov, Sergei A, Arachchige, Indika, Aikens, Christine M

“…Geometries, ligand binding energies, electronic structure, and excitation spectra are determined for Au4(PR3)42+ and Au4( Delta *m2-I)2(PR3)4 clusters (R =…”
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Breaking the phonon bottleneck in semiconductor nanocrystals via multiphonon emission induced by intrinsic nonadiabatic interactions by SCHALLER, Richard D, PIETRYGA, Jeffrey M, GOUPALOV, Serguei V, PETRUSKA, Melissa A, IVANOV, Sergei A, KLIMOV, Victor I

“…We observe ultrafast 1P-to-1S intraband relaxation in PbSe and CdSe nanocrystals (NCs) that have distinct energy spectra. While ultrafast dynamics in CdSe NCs…”
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Formation and Stabilization of Fluorescent Gold Nanoclusters Using Small Molecules by Bao, Yuping, Yeh, Hsin-Chih, Zhong, Chang, Ivanov, Sergei A, Sharma, Jaswinder K, Neidig, Michael L, Vu, Dung M, Shreve, Andrew P, Dyer, R. Brian, Werner, James H, Martinez, Jennifer S

“…Biological molecular imaging and sensing requires fluorophores that are not only stable and bright, but also small enough to allow the unencumbered observation…”
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Material Characterization Study of Magnetite Nanocrystals for RF Sensing by Sherburne, Michael D., Dreier, Timothy A., Klitsner, Benjamin H., Huber, Dale L., Ivanov, Sergei A., Parks, Chris, Simons, Matt T., Schamiloglu, Edl

“…Magnetite nanocrystals show promise for electrically small gigahertz frequency applications, which could lead to miniaturizing transformer cores and new…”
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Structural Dynamics and Electronic Properties of Semiconductor Quantum Dots: Computational Insights by Ghosh, Dibyajyoti, Ivanov, Sergei A, Tretiak, Sergei

“…Semiconductor quantum dots (QDs) exhibit exciting photophysical properties for a wide variety of applications in the field of energy conversion, lighting, and…”
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Amorphous and Crystalline GeTe Nanocrystals by Arachchige, Indika U., Soriano, Ronald, Malliakas, Christos D., Ivanov, Sergei A., Kanatzidis, Mercouri G.

“…A facile method for the synthesis of crystalline and amorphous GeTe nanoparticles (NPs) using bis((trimethylsilyl)amido)germanium(II), Ge[N(SiMe3)2]2, and…”
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From Inside Out: How the Buried Interface, Shell Defects, and Surface Chemistry Conspire to Determine Optical Performance in Nonblinking Giant Quantum Dots by Singh, Ajay, Majumder, Somak, Thompson Orfield, Noah J., Sarpkaya, Ibrahim, Nordlund, Dennis, Bustillo, Karen C., Ciston, Jim, Nisoli, Victoria, Ivanov, Sergei A., Bowes, Eric G., Htoon, Han, Hollingsworth, Jennifer A.

“…“Giant” or core/thick‐shell quantum dots (gQDs) are an important class of solid‐state quantum emitter characterized by strongly suppressed blinking and…”
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Ligand Effects on Optical Properties of Small Gold Clusters: A TDDFT Study by Goel, Satyender, Velizhanin, Kirill A, Piryatinski, Andrei, Ivanov, Sergei A, Tretiak, Sergei

“…Ligand influence on the excited state structure of small neutral gold clusters (Au2 and Au4) has been investigated using Time Dependent Density Functional…”
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Light Amplification Using Inverted Core/Shell Nanocrystals:  Towards Lasing in the Single-Exciton Regime by Ivanov, Sergei A, Nanda, Jagjit, Piryatinski, Andrei, Achermann, Marc, Balet, Laurent P, Bezel, Ilia V, Anikeeva, Polina O, Tretiak, Sergei, Klimov, Victor I

“…Size-controlled spectral tunability and chemical flexibility make semiconductor nanocrystals (NCs) attractive as nanoscale building blocks for color-selectable…”
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Chalcogenide Thin Films—Holographic Media for Augmented Reality Devices by Borisov, Vladimir N., Muravyev, Nikolay V., Popov, Mikhail V., Okun, Roman A., Angervaks, Aleksandr E., Vostrikov, Gavril N., Kozyukhin, Sergey A., Terekhov, Dmitry Yu, Lazarenko, Petr I., Musikhina, Ekaterina S., Ivanov, Sergei A.

“…Holographic characteristics of chalcogenide film materials with a typical thickness of 0.5–1.5 µm of a number of Ge-S and As-S compositions have been studied…”
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Ligand Controls Excited Charge Carrier Dynamics in Metal-Rich CdSe Quantum Dots: Computational Insights by Samanta, Kushal, Deswal, Priyanka, Alam, Shayeeque, Bhati, Manav, Ivanov, Sergei A., Tretiak, Sergei, Ghosh, Dibyajyoti

“…Small metal-rich semiconducting quantum dots (QDs) are promising for solid-state lighting and single-photon emission due to their highly tunable yet narrow…”
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New records and range expansion of Calosoma sycophanta (Linnaeus, 1758) (Coleoptera, Carabidae) in Western Siberia, Russia by Stolbov, Vitaly A., Kuzmin, Igor V., Lomakin, Dmitry E., Ivanov, Sergei A., Sitnikov, Pavel S.

“…In this study, we report about 25 records of Calosoma sycophanta (Linnaeus, 1758) from Western Siberia collected in the last 21 years (1997–2017). We extend…”
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Octahedral Hexapalladium Pseudo-Td Pd6(μ3-CO)4(PEt3)6 with 80 Electron-Deficient Cluster Valence Electrons (CVEs) and a Comparison with Octahedral Hexapalladium Pseudo-C2v Pd6(μ3-CO)4(PMe3)7 with 82 CVEs: Computational Analysis and Resulting Implications by Ivanov, Sergei A, Mednikov, Evgueni G, Dahl, Lawrence F

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Octahedral Hexapalladium Pseudo- T d Pd 6 (μ 3 -CO) 4 (PEt 3 ) 6 with 80 Electron-Deficient Cluster Valence Electrons (CVEs) and a Comparison with Octahedral Hexapalladium Pseudo- C 2 v Pd 6 (μ 3 -CO) 4 (PMe 3 ) 7 with 82 CVEs: Computational Analysis and Resulting Implications by Ivanov, Sergei A, Mednikov, Evgueni G, Dahl, Lawrence F

“…The elusive octahedral hexapalladium Pd (μ -CO) (PEt ) ( ) was obtained by the reaction of Pd (CO) (PEt ) with TlCo(CO) in tetrahydrofuran under N at 55 °C…”
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Isolation and Structural Characterization of a Mackay 55-Metal-Atom Two-Shell Icosahedron of Pseudo-Ih Symmetry, Pd55L12(μ3-CO)20 (L = PR3, R = Isopropyl): Comparative Analysis with Interior Two-Shell Icosahedral Geometries in Capped Three-Shell Pd145, Pt-Centered Four-Shell Pd-Pt M165, and Four-Shell Au133 Nanoclusters by Erickson, Jeremiah D, Mednikov, Evgueni G, Ivanov, Sergei A, Dahl, Lawrence F

“…We present the first successful isolation and crystallographic characterization of a Mackay 55-metal-atom two-shell icosahedron, Pd55L12(μ3-CO)20 (L = PPr(i)3)…”
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Complex pH-Dependent Interactions between Weak Polyelectrolyte Block Copolymer Micelles and Molecular Fluorophores by Copp, Stacy M, Hamblin, Ryan L, Swingle, Kirstie, Rai, Durgesh, Urban, Volker S, Ivanov, Sergei A, Montaño, Gabriel A

“…Amphiphilic block copolymers with weak polyelectrolyte blocks can assemble stimulus-responsive nanostructures and interfaces. Applications of these materials…”
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