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2,381 Newest Publications about the topic nanocrystals
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Tiny Grains Give Huge Gains: Nanocrystal-Based Signal Amplification for Biomolecule Detection
13-05-2013 | Sheng Tong; Binbin Ren; Zhilan Zheng; Han Shen; Gang Bao, ACS Nano, 2013
Nanocrystals, despite their tiny sizes, contain thousands to millions of atoms. Here we show that the large number of atoms packed in each metallic nanocrystal can provide a huge gain in signal amplification for biomolecule detection. We have devised a highly sensitive, linear amplification ...
Doping and Quantum Confinement Effects in Single Si Nanocrystals Observed by Scanning Tunneling Spectroscopy
13-05-2013 | O. Wolf; M. Dasog; Z. Yang; I. Balberg; J. G. C. Veinot; O. Millo, Nano Letters, 2013
We have applied scanning tunneling spectroscopy in studies of the electronic level structure of surface-functionalized colloidal Si nanocrystals (Si-NCs) as a function of their size for various capping ligands. The energy gaps extracted from the tunneling spectra increase with decreasing NC ...
Poly-(3)hexylthiophene nanowire networks for versatile fabrication of bulk heterojunctions with increased active volume
13-05-2013 | Theodore J. Kramer, Annabel R. Chew, Theanne Schiros, Ioannis Kymissis, and Irving P. Herman, Journal of Vacuum Science & Technology B, 2013
Spontaneous demixing of poly-(3)hexylthiophene (P3HT) and polystyrene (PS) generates a dense array of crystalline P3HT nanowires embedded in a PS matrix. The PS phase is subsequently removed, to form a network of P3HT nanowires with a greatly enhanced surface area-to-volume ratio relative to ...
Silicon nanodot formation and self‐ordering under bombardment with heavy Bi3 ions
08-05-2013 | Roman Böttger, Karl‐Heinz Heinig, Lothar Bischoff, Bartosz Liedke, René Hübner, Wolfgang Pilz, physica status solidi (RRL) - Rapid Research Letters, 2013
Abstract Si nanodots of high density and hexagonal short‐range order are observed upon normal‐incidence bombardment of hot, crystalline Si with Bi3+ ions having a kinetic energy of a few tens of keV. The heights of nanodots are comparable to their widths of ∼20 nm. The implanted Bi ...
Facile noninjection synthesis and photocatalytic properties of wurtzite-phase CuGaS2 nanocrystals with elongated morphologies
08-05-2013 | Michelle D. Regulacio; Chen Ye; Suo Hon Lim; Yuangang Zheng; Qinghua Xu; Mingyong Han, CrystEngComm, 2013
In this Communication, we present the colloidal preparation of ternary CuGaS2 (CGS) nanocrystals that exhibit elongated morphologies and possess the metastable wurtzite crystal structure. A facile noninjection-based synthetic strategy was utilized wherein dithiocarbamate complexes of copper ...
Shape-controlled synthesis of PbS nanostructures from -20 to 240 [degree]C: the competitive process between growth kinetics and thermodynamics
08-05-2013 | Yingnan Wang; Xinyi Yang; Guanjun Xiao; Bo Zhou; Bingbing Liu; Guangtian Zou; Bo Zou, CrystEngComm, 2013
The traditional concept about synthesis of semiconductor nanocrystals (NCs) by solvent routes usually performed under high temperature, which caused the semiconductor materials to nucleate and grow into various shaped NCs in solution. Therefore, these methods are named as the 'solvent-thermal ...
Three-Dimensional Self-Assembly of Chalcopyrite Copper Indium Diselenide Nanocrystals into Oriented Films
08-05-2013 | Danielle C. Reifsnyder; Xingchen Ye; Thomas R. Gordon; Chengyu Song; Christopher B. Murray, ACS Nano, 2013
CuInSe2, which is one of the highest efficiency thin-film solar cell active layer materials, has been an attractive target for nanocrystal synthesis and manipulation. Here, we report unprecedented, simultaneous control of the synthesis and self-assembly behavior of CuInSe2 nanocrystals. These ...
Understanding Morphology-Controlled Synthesis of Zinc Nanoparticles and Their Characteristics of Hydrolysis Reaction
08-05-2013 | Byoungjun Mun; Donggeun Lee, Langmuir, 2013
Two-step thermochemical water-splitting cycle based on a Zn/ZnO redox pair is considered as a potential route for carbon-free production of hydrogen because the first hydrolysis step of the cycle highly depends on the method of preparation and the resultant particle characteristics, such as ...
High Resolution Electron Microscopy Study of Nanocubes and Polyhedral Nanocrystals of Cerium(IV) Oxide
08-05-2013 | Marco A. L. Cordeiro; Weihao Weng; Daniel G. Stroppa; Christopher J. Kiely; Edson R. Leite, Chemistry of Materials, 2013
In this research, high resolution transmission electron microscopy (HRTEM) and high angle annular dark field–scanning transmission electron microscopy (HAADF-STEM) studies of ceria(IV) oxide CeO2 nanocrystals (NCs) synthesized by a hydrothermal/two phase process were conducted. The synthesis ...
Beyond the Effect of Particle Size: Influence of CoFe2O4 Nanoparticle Arrangements on Magnetic Properties
07-05-2013 | D. Peddis; C. Cannas; A. Musinu; A. Ardu; F. Orrù; D. Fiorani; S. Laureti; D. Rinaldi; G. Muscas; G. Concas; G. Picc ..., Chemistry of Materials, 2013
This paper focuses on the magnetic properties of CoFe2O4 nanoparticles, discussing the influence of nanoparticles arrangements obtained by different synthesis methods. Using high thermal decomposition (HTD) and direct micellar (DM) routes, three samples of CoFe2O4 nanoparticles with equal ...
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