Towards quantum dot and FRET-based optical DNA biosensor technology: surface chemistry and photoluminescence of CdSe/ZnS and Si quantum dots

2007 ◽  
Author(s):  
W. Russ Algar ◽  
Yuehui Zhou ◽  
Jiang Zeng ◽  
Ulrich J. Krull
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Surface Chemistry ◽  
Dna Biosensor ◽  
Biosensor Technology ◽  
Si Quantum Dots

A Nanoscale Adventure with Silicon: Synthesis, Surface Chemistry, and other Surprises

2015 ◽  
Vol 242 ◽  
pp. 383-390
Author(s):  
Md Hosnay Mobarok ◽  
Tapas K. Purkait ◽  
Jonathan G.C. Veinot
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Surface Chemistry ◽  
Research Group ◽  
Size Dependent ◽  
Earth Abundant ◽  
Potential Applications ◽  
Si Quantum Dots

The preparation and surface chemistry Si quantum dots (SiQDs) are currently an intense focus of research because of their size dependent optical properties and many potential applications. SiQDs offer several advantages over other quantum dots; Si is earth abundant, non-toxic and biocompatible. This account briefly highlights recent advancements made by our research group related to the synthesis, functionalization, surface dependent optical properties and applications of SiQDs.

Enhancement of efficiency and long-term stability in graphene/Si-quantum-dot heterojunction photodetectors by employing bis(trifluoromethanesulfonyl)-amide as a dopant for graphene

2017 ◽  
Vol 5 (48) ◽  
pp. 12737-12743 ◽  
Author(s):  
Dong Hee Shin ◽  
Chan Wook Jang ◽  
Ju Hwan Kim ◽  
Jong Min Kim ◽  
Ha Seung Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Term Stability ◽  
Long Term Stability ◽  
Si Quantum Dot ◽  
First Time ◽  
Si Quantum Dots

Bis(trifluoromethanesulfonyl)-amide (TFSA) is for the first time employed as a dopant for graphene for graphene/Si-quantum-dots-based photodetectors.

scholarly journals Realization of the Kohn’s Theorem in Ge/Si Quantum Dots with Hole Gas: Theory and Experiment

Nanomaterials ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 56 ◽  
Author(s):  
Hayk A. Sarkisyan ◽  
David B. Hayrapetyan ◽  
Lyudvig S. Petrosyan ◽  
Eduard M. Kazaryan ◽  
Anton N. Sofronov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Molecular Beam ◽  
Far Infrared ◽  
Resonant Absorption ◽  
Experimental Results ◽  
Quantum Transitions ◽  
Si Quantum Dots ◽  
Specific Quantum ◽  
Good Agreement

This article discusses specific quantum transitions in a few-particle hole gas, localized in a strongly oblate lens-shaped quantum dot. Based on the adiabatic method, the possibility of realizing the generalized Kohn theorem in such a system is shown. The criteria for the implementation of this theorem in a lens-shaped quantum dot, fulfilled in the experiment, is presented. An analytical expression is obtained for the frequencies of resonant absorption of far-infrared radiation by a gas of heavy holes, which depends on the geometric parameters of the quantum dot. The results of experiments on far-infrared absorption in the arrays of p-doped Ge/Si quantum dots grown by molecular beam epitaxy (MBE) with gradually increasing average number of holes in dot are presented. Experimental results show that the Coulomb interaction between the holes does not affect the resonant frequency of the transitions. A good agreement between the theoretical and experimental results is shown.

scholarly journals Two-colour Three-pulse Spectrally Resolved Nonlinear Spectroscopy for Studies of Dynamics in Semiconductor Si Quantum Dots

2020 ◽  
Vol 30 (1) ◽  
pp. 79
Author(s):  
Vuong Van Cuong ◽  
Dinh Ba Khuong ◽  
Dao Van Lap
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Optical Phonon ◽  
Acoustic Phonon ◽  
Nonlinear Spectroscopy ◽  
Transverse Optical ◽  
Transverse Acoustic ◽  
Spectrally Resolved ◽  
Si Quantum Dots

We demonstrate that a two-colour three-pulsenonlinear spectroscopy can be used to study the dynamics of excited carriers inSi quantum dot structures embedded in SiN. Decays of the transverse optical phonon population and the transverse acoustic phonon population are measured and discussed. A simple theoretical modelis also used to support interpretation of our experimental observations.

Size-controlled Si quantum dots embedded in B-doped SiNx/Si3N4 superlatice for Si quantum dot solar cells

2016 ◽  
Vol 28 (2) ◽  
pp. 1322-1327 ◽  
Author(s):  
Xiaobo Chen ◽  
Wen Yang ◽  
Peizhi Yang ◽  
Junbao Yuan ◽  
Fei Zhao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Si Quantum Dot ◽  
Quantum Dot Solar Cells ◽  
Size Controlled ◽  
Si Quantum Dots

scholarly journals Quantum dot induced cellular perturbations involving varying toxicity pathways

2015 ◽  
Vol 4 (3) ◽  
pp. 623-633 ◽  
Author(s):  
Abdullah Al-Ali ◽  
Neenu Singh ◽  
Bella Manshian ◽  
Tom Wilkinson ◽  
John Wills ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Surface Chemistry ◽  
Cellular Uptake ◽  
Toxicity Pathways

Quantum dots (QD) with varying surface chemistry can have an impact on cellular uptake and a range of indicators for cell perturbation.

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