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.

Surface chemistry regulates optical properties and cellular interactions of ultrasmall MoS2 quantum dots for biomedical applications

2021 ◽  
Author(s):  
Kangqiang Liang ◽  
Shaohua Qu ◽  
Yixiao Li ◽  
Li-Li Tan ◽  
Li Shang
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Surface Chemistry ◽  
Molybdenum Disulfide ◽  
Biomedical Applications ◽  
Cell Imaging ◽  
Cellular Interactions ◽  
Potential Applications

Molybdenum disulfide quantum dots (MoS2 QDs) have drawn increasing attention owing to their distinct optical properties and potential applications in many fields such as biosensing, photocatalysis and cell imaging. Elucidating...

Size dependent optical properties of Si quantum dots in Si-rich nitride/Si3N4 superlattice synthesized by magnetron sputtering

2011 ◽  
Vol 109 (6) ◽  
pp. 064302 ◽  
Author(s):  
Yong-Heng So ◽  
Angus Gentle ◽  
Shujuan Huang ◽  
Gavin Conibeer ◽  
Martin A. Green
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Magnetron Sputtering ◽  
Size Dependent ◽  
Si Quantum Dots

Size-dependent electroluminescence from Si quantum dots embedded in amorphous SiC matrix

2011 ◽  
Vol 110 (6) ◽  
pp. 064322 ◽  
Author(s):  
Yunjun Rui ◽  
Shuxin Li ◽  
Jun Xu ◽  
Chao Song ◽  
Xiaofan Jiang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Size Dependent ◽  
Amorphous Sic ◽  
Si Quantum Dots

scholarly journals Quantum Dots and Applications

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 897
Author(s):  
Chang-Yeol Han ◽  
Hyun-Sik Kim ◽  
Heesun Yang
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Band Gap ◽  
Light Emitting Diodes ◽  
Photovoltaic Cells ◽  
Core Shell ◽  
Special Issue ◽  
High Quality ◽  
Light Emitting ◽  
Size Dependent

It is the unique size-dependent band gap of quantum dots (QDs) that makes them so special in various applications. They have attracted great interest, especially in optoelectronic fields such as light emitting diodes and photovoltaic cells, because their photoluminescent characteristics can be significantly improved via optimization of the processes by which they are synthesized. Control of their core/shell heterostructures is especially important and advantageous. However, a few challenges remain to be overcome before QD-based devices can completely replace current optoelectronic technology. This Special Issue provides detailed guides for synthesis of high-quality QDs and their applications. In terms of fabricating devices, tailoring optical properties of QDs and engineering defects in QD-related interfaces for higher performance remain important issues to be addressed.

Size-Dependent Antibacterial Behavior of Graphene Quantum Dots

2013 ◽  
Author(s):  
Siheng Su ◽  
Carla B. Shelton ◽  
Jingjing Qiu
Keyword(s):  
Quantum Dots ◽  
Surface Chemistry ◽  
Graphene Quantum Dots ◽  
Gel Filtration ◽  
Filtration Method ◽  
E Coli ◽  
Size Dependent ◽  
Mtt Method ◽  
Diphenyltetrazolium Bromide ◽  
Standard Plate

In this study, the antibacterial behavior of differing sized graphene quantum dots (GQDs) was studied. The gram negative bacteria, Escherichia coli (E. coli), were used as the bacteria mode. Different sized GQDs with tunable fluorescent colors were acquired by a gel-filtration method. The size, surface chemistry, and photoluminescence properties of GQDs were characterized, respectively. The viability of GQDs treated bacteria was determined by the standard plate counting method. Moreover, the reactive oxidative species (ROS) level was detected by the 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) method. The integrality of the bacteria membrane was observed under the scanning electron microscopy (SEM). The experimental results indicated that GQDs demonstrated size-dependent and surface chemistry-dependent antibacterial behaviors. This research provided insightful guidelines in the selection of suitable GQDs for their potential bioapplications.

Optical properties of stacked Ge/Si quantum dots with different spacer thickness grown by chemical vapor deposition

2004 ◽  
Vol 224 (1-4) ◽  
pp. 148-151 ◽  
Author(s):  
Wen-Yen Chen ◽  
Wen-Hao Chang ◽  
An-Tai Chou ◽  
Tzu-Min Hsu ◽  
Pan-Shiu Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Spacer Thickness ◽  
Si Quantum Dots

Size-Dependent Optical Properties of Luminescent Zn3P2 Quantum Dots

2015 ◽  
Vol 119 (19) ◽  
pp. 10576-10584 ◽  
Author(s):  
Minh Q. Ho ◽  
Richard J Alan Esteves ◽  
Gotluru Kedarnath ◽  
Indika U. Arachchige
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Size Dependent
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