نتایج جستجو برای: colloidal quantum dots

تعداد نتایج: 320262  

2003
Erik Herz Kenith E. Meissner Dwight D. Viehland Ken Meissner Dwight Viehland

Luminescent quantum dots (QDs) or rods are semiconductor nano-particles that may be used for a wide array of applications such as in electro-optical devices, spectral bar coding, tagging and light filtering. In the case under investigation, the nano-particles are cadmium-selenide (CdSe), though they can be made from cadmium-sulfide, cadmium-telluride or a number of other II-VI and III-V materia...

Journal: :Coatings 2022

In this paper, we investigate an intraband mid-infrared photodetector based on HgSe colloidal quantum dots (CQDs). We study the size, absorption spectra, and carrier mobility of CQDs films. By regulating time temperature reaction during synthesis, have achieved regulation number electrons doped in conduction band. It is experimentally verified by field effect transistor measurement that dark cu...

A. Abbasi Rostami A. Daraei, A. Kazempour M. Rahimi Aliabad M. Shokohi S. Ahmadi S. H. Hajiemam

In this paper, we investigate variation of the wavelength, intensity and polarization of the self-assembled InAs/GaAs quantum dots emission by microphotoluminescence spectroscopy at the liquid helium temperature. The microcavity wafer sample is grown by molecular beam epitaxy (MBE) and chemically etched into the micropillar structure (with elliptical cross section - long and short axis 2µm×1.5µ...

Journal: :Nano letters 2013
Wei Xiong Daniel D Hickstein Kyle J Schnitzenbaumer Jennifer L Ellis Brett B Palm K Ellen Keister Chengyuan Ding Luis Miaja-Avila Gordana Dukovic Jose L Jimenez Margaret M Murnane Henry C Kapteyn

We present the first photoelectron spectroscopy measurements of quantum dots (semiconductor nanocrystals) in the gas phase. By coupling a nanoparticle aerosol source to a femtosecond velocity map imaging photoelectron spectrometer, we apply robust gas-phase photoelectron spectroscopy techniques to colloidal quantum dots, which typically must be studied in a liquid solvent or while bound to a su...

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