Enhancing Quantum Dots for Bioimaging using Advanced Surface Chemistry and Advanced Optical Microscopy: Application to Silicon Quantum Dots (SiQDs)

2015 ◽  
Vol 27 (40) ◽  
pp. 6144-6150 ◽  
Author(s):  
Xiaoyu Cheng ◽  
Elizabeth Hinde ◽  
Dylan M. Owen ◽  
Stuart B. Lowe ◽  
Peter J. Reece ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Chemistry ◽  
Optical Microscopy ◽  
Silicon Quantum Dots

Surface chemistry and density distribution influence on visible luminescence of silicon quantum dots: an experimental and theoretical approach

2017 ◽  
Vol 19 (2) ◽  
pp. 1526-1535 ◽  
Author(s):  
Ateet Dutt ◽  
Yasuhiro Matsumoto ◽  
G. Santana-Rodríguez ◽  
Estrella Ramos ◽  
B. Marel Monroy ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Chemistry ◽  
Density Distribution ◽  
Theoretical Approach ◽  
Silicon Quantum Dots ◽  
Visible Luminescence

Visible luminescence and hence the mechanism of emission from Si QDs depending on the size and/or the passivation environment are presented.

The effects of electronic coupling between capping molecules and quantum dots on the light absorption and emission of octyl, styryl, and 4-ethynylstyryl terminated silicon quantum dots

2014 ◽  
Vol 16 (35) ◽  
pp. 18821-18826 ◽  
Author(s):  
Thu-Huong Le ◽  
Hyun-Dam Jeong
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Surface Chemistry ◽  
Light Absorption ◽  
Electronic Coupling ◽  
Silicon Quantum Dots ◽  
Absorption And Emission

Optical properties of silicon quantum dots (Si QDs) are greatly influenced by their size and surface chemistry.

Improved Autoadhesion Measurement Method for Micromachined Polysilicon Beams

1996 ◽  
Vol 444 ◽  
Author(s):  
Maarten P. de Boer ◽  
Terry A. Michalske
Keyword(s):  
Surface Chemistry ◽  
Optical Microscopy ◽  
Measurement Method ◽  
Current Practice ◽  
Cantilever Beams ◽  
Beam Length ◽  
Substrate Adhesion

AbstractWe have measured autoadhesion (e.g. stiction) of individual polysilicon beams by interferometric optical microscopy. Untreated cantilever beams were dried from water in air, while treated beams were coated with a hydrophobic molecular coating of octadecyltrichlorosilane (ODTS). Adhesion values obtained for beams adhered to the substrate over a long length (large d) are independent of beam length with values of 16.7 and 4.4 mJ/m2 for untreated and treated samples respectively. These values can be understood in terms of differences in surface chemistry and polysilicon roughness. Using the shortest length beam which remains attached to the substrate, adhesion values were 280 and 16 mJ/m2 respectively. These higher values may be a result of capillarity effects. We recommend that measurements be made on beams in which d is large, in contrast to the current practice of noting the shortest beam adhered.

Communication: Photoinduced Carbon Dioxide Binding with Surface-Functionalized Silicon Quantum Dots

2018 ◽  
Author(s):  
Oscar A. Douglas-Gallardo ◽  
Cristián Gabriel Sánchez ◽  
Esteban Vöhringer-Martinez
Keyword(s):  
Carbon Dioxide ◽  
Quantum Dots ◽  
Atmospheric Carbon Dioxide ◽  
Density Functional ◽  
Tight Binding ◽  
Carbon Dioxide Concentration ◽  
Research Area ◽  
Silicon Quantum Dots ◽  
Dependent Model ◽  
Photoinduced Charge

<div> <div> <div> <p>Nowadays, the search of efficient methods able to reduce the high atmospheric carbon dioxide concentration has turned into a very dynamic research area. Several environmental problems have been closely associated with the high atmospheric level of this greenhouse gas. Here, a novel system based on the use of surface-functionalized silicon quantum dots (sf -SiQDs) is theoretically proposed as a versatile device to bind carbon dioxide. Within this approach, carbon dioxide trapping is modulated by a photoinduced charge redistribution between the capping molecule and the silicon quantum dots (SiQDs). Chemical and electronic properties of the proposed SiQDs have been studied with Density Functional Theory (DFT) and Density Functional Tight-Binding (DFTB) approach along with a Time-Dependent model based on the DFTB (TD-DFTB) framework. To the best of our knowledge, this is the first report that proposes and explores the potential application of a versatile and friendly device based on the use of sf -SiQDs for photochemically activated carbon dioxide fixation. </p> </div> </div> </div>

Size-Dependent Photothermal Performance of Silicon Quantum Dots

2021 ◽  
Vol 125 (6) ◽  
pp. 3421-3431
Author(s):  
İrem Nur Gamze Özbilgin ◽  
Batu Ghosh ◽  
Hiroyuki Yamada ◽  
Naoto Shirahata
Keyword(s):  
Quantum Dots ◽  
Silicon Quantum Dots ◽  
Size Dependent

scholarly journals Surface‐Anisotropic Janus Silicon Quantum Dots via Masking on 2D Silicon Nanosheets

2021 ◽  
pp. 2100288
Author(s):  
Marc Julian Kloberg ◽  
Haoyang Yu ◽  
Elisabeth Groß ◽  
Felix Eckmann ◽  
Tassilo M. F. Restle ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silicon Quantum Dots
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