첨부 '1' |
---|
author | Kwangyeol Lee |
---|---|
journal | Small, 2016, 12, 5728.(DOI: 10.1002/smll.201602112) |
Homepage | http://nanolab.korea.ac.kr/ |
Nanostructured copper sulfides, promising earth-abundant p-type semiconductors, have found applications in a wide range of fields due to their versatility, tunable low bandgap, and environmental sustainability. The synthesis of hexagonal Cu7S4@Au2S@Au nanorings exhibiting plasmon enhanced emissions at the direct bandgap is reported. The synthesized Cu7S4@Au2S@Au nanorings show greatly enhanced absorption and emission by local plasmons compared to pure copper sulfide nanoparticles.
http://onlinelibrary.wiley.com/doi/10.1002/smll.201602112/full
-
Singly and Doubly Occupied Higher Quantum State in Nanocrystals
Filling the lowest quantum state of the conduction band (CB) of colloidal nanocrystals with a single electron, which is analogous to the filling the lowest unoccupied molecular orbital (LUMO) in a molecule with a single electron, has attract... -
Cost-Effective, High-Performance Porous-Organic-Polymer Conductors Functionalized with Sulfonic Acid Groups by Direct Postsynthetic Substitution
We demonstrate the facile microwave-assisted synthesis of a porous organic framework 1 and the sulfonated solid (1S) through postsubstitution. Remarkably, the conductivity of 1S showed an approximately 300-fold enhancement at 30 °C as compar... -
Liposomal Texaphyrin Theranostics for Metastatic Liver Cancer
Reported here is a new theranostic agent, 1, which consists of a Gd3+-texaphyrin core conjugated to a doxorubicin prodrug via a disulfide bond. Conjugate 1 was designed to undergo cleavage in the presence of glutathione (GSH), a species typi... -
Water Dynamics in Cytoplasm-Like Crowded Environment Correlates with the Conformational Transition of the Macromolecular Crowder
Polyethylene glycol (PEG) is a unique polymer material with enormous applicability in many industrial and scientific fields. Here, its use as macromolecular crowder to mimic the cellular environment in vitro is the focus of the present study... -
Plasmon Enhanced Direct Bandgap Emissions in Cu7S4@Au2S@Au Nanorings
Nanostructured copper sulfides, promising earth-abundant p-type semiconductors, have found applications in a wide range of fields due to their versatility, tunable low bandgap, and environmental sustainability. The synthesis of hexagonal Cu7... -
Highly Efficient Fullerene-Free Polymer Solar Cells Fabricated with Polythiophene Derivative
A highly efficient fullerene-free polymer solar cell (PSC) based on PDCBT, a polythiophene derivative substituted with alkoxycarbonyl, has achieved an impressive power conversion efficiency of 10.16%, which is the best result in PSCs based o... -
Low-voltage organic devices based on pristine and self-assembled monolayer-treated HfTiOx gate dielectrics
Low-voltage organic field-effect transistors (OFETs) and complementary metal oxide semiconductor (CMOS) inverters based on pentacene and N,N′-ditridecylperylene-3,4,9,10-tetracarboxylic diimide (PTCDI-C13) were fabricated on HfTiOx gate diel... -
Higher Quantum State Transitions in Colloidal Quantum Dot with Heavy Electron Doping
Electron occupation in the lowest quantized state of the conduction band (1Se) in the colloidal quantum dot leads to the intraband transition in steady-state (1Se-1Pe). The intraband transition, solely originating from the quantum confinemen... -
High-harmonic generation: Drive round the twist
Light has long been used to detect the chirality of molecules but high-order harmonic generation now provides access to these chiral interactions on ultrafast timescales. http://www.nature.com/nphys/journal/v11/n8/full/nphys3395.html -
Gradients of Rectification: Tuning Molecular Electronic Devices by the Controlled Use of Different-Sized Diluents in Heterogeneous Self-Assembled Monolayers
Molecular electronics has received significant attention in the last decades. To hone performance of devices, eliminating structural defects in molecular components inside devices is usually needed. We herein demonstrate this problem can be ... -
Investigation of Charge Carrier Behavior in High Performance Ternary Blend Polymer Solar Cells
This study demonstrates high-performance, ternary-blend polymer solar cells by modifying a binary blend bulk heterojunction (PPDT2FBT:PC71BM) with the addition of a ternary component, PPDT2CNBT. PPDT2CNBT is designed to have complementary ab... -
Adsorption of Carbon Dioxide on Unsaturated Metal Sites in M2(dobpdc) Frameworks with Exceptional Structural Stability and Relation between Lewis Acidity and Adsorption Enthalpy
A series of metal–organic frameworks (MOFs) M2(dobpdc) (M=Mn, Co, Ni, Zn; H4dobpdc=4,4′-dihydroxy-1,1′-biphenyl-3,3′-dicarboxylic acid), with a highly dense arrangement of open metal sites along hexagonal channels were prepared by microwave-... -
Programmed activation of cancer cell apoptosis: A tumor-targeted phototherapeutic topoisomerase I inhibitor
We report here a tumor-targeting masked phototherapeutic agent 1 (PT-1). This system contains SN-38—a prodrug of the topoisomerase I inhibitor irinotecan. Topoisomerase I is a vital enzyme that controls DNA topology during replication, trans... -
Probing Distinct Fullerene Formation Processes from Carbon Precursors of Different Sizes and Structures
Fullerenes, cage-structured carbon allotropes, have been the subject of extensive research as new materials for diverse purposes. Yet, their formation process is still not clearly understood at the molecular level. In this study, we performe... -
Manifesting Subtle Differences of Neutral Hydrophilic Guest Isomers in a Molecular Container by Phase Transfer
Achieving strong host–guest interactions between synthetic hosts and hydrophilic guests in solution is challenging because solvation effects overwhelm other effects. To resolve this issue, we transferred complexes of cucurbit[7]uril (CB[7]) ... -
Structure and assembly mechanisms of toxic human islet amyloid polypeptide oligomers associated with copper
Amyloidosis is a clinical disorder implicated with the formation of toxic amyloid aggregates. Despite their pathological significance, it is challenging to define the structural characteristics of amyloid oligomers owing to their metastable ... -
A High Efficiency Nonfullerene Organic Solar Cell with Optimized Crystalline Organizations
A well-organized donor–acceptor crystalline structure is examined for high performance nonfullerene solar cells. By thermal annealing, nanoscale structures of both donor and acceptor domains are successfully modulated, followed by signific... -
Diastereomeric Resolution of a Racemic Biaryl Boronic Acid and Its Application to Divergent Asymmetric Total Syntheses of Some Axially Chiral Natural Products
The asymmetric total syntheses of deshydroxy-tetramethylcupressuflavone and desmethylkotanin and the synthesis of a key intermediate in the previous synthesis of hibarimicinone were described using an axially chiral biaryl boronic acid, prep... -
Origin of the Reversible Thermochromic Properties of Polydiacetylenes Revealed by Ultrafast Spectroscopy
Polydiacetylenes (PDAs) with thermochromic properties undergo colorimetric transitions when the external temperature is varied. This capability has the potential to enable these materials to be used as temperature sensors. These thermochromi... -
Facet-controlled hollow Rh2S3 hexagonal nanoprisms as highly active and structurally robust catalysts toward hydrogen evolution reaction
Hollow Rh2S3 hexagonal nanoprisms, prepared by one-step formation of Cu1.94S@Rh2S3core-shell nanoprisms followed by the etching of core, exhibit very high catalytic activity and excellent stability toward hydrogen evolution reaction under ha...