Phonon influence on emission spectra of biexciton and exciton complexes in semiconductor quantum dots

2009 ◽  
Vol 86 (6) ◽  
pp. 67011 ◽  
Author(s):  
T. O. Cheche
Keyword(s):  
Quantum Dots ◽  
Emission Spectra ◽  
Semiconductor Quantum Dots

scholarly journals Semiconductor Quantum Dots Surface Modification for Potential Cancer Diagnostic and Therapeutic Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Jidong Wang ◽  
Shumin Han ◽  
Dandan Ke ◽  
Ruibing Wang
Keyword(s):  
Quantum Dots ◽  
Surface Modification ◽  
Photophysical Properties ◽  
Aqueous Media ◽  
Simultaneous Detection ◽  
Emission Spectra ◽  
Semiconductor Quantum Dots ◽  
Therapeutic Applications ◽  
Cancer Diagnostic ◽  
Potential Cancer

Semiconductor Quantum dots (QDs) have generated extensive interest for biological and clinical applications. These applications arise from their unique properties, such as high brightness, long-term stability, simultaneous detection of multiple signals, tunable emission spectra. However, high-quality QDs, whether single or core-shell QDs, are most commonly synthesized in organic solution and surface-stabilized with hydrophobic organic ligands and thus lack intrinsic aqueous solubility. For biological applications, very often it is necessary to make the QDs dispersible in water and therefore to modify the QD surfaces with various bifunctional surface ligands or caps to promote solubility in aqueous media. Well-defined methods have been developed for QD surface modification to impart biocompatibility to these systems. In this review, we summarize the recent progress and strategies of QDs surface modification for potential cancer diagnostic and therapeutic applications. In addition, the question that arose from QD surface modification, such as impact of size increase of QD bioconjugates after surface-functionalization or surface modification on photophysical properties of QDs, are also discussed.

scholarly journals The bright future: Imaging dynamic cellular events with quantum dots

2010 ◽  
Vol 32 (3) ◽  
pp. 12-17 ◽  
Author(s):  
Andrew M. Smith ◽  
Mary M. Wen ◽  
Shuming Nie
Keyword(s):  
Quantum Dots ◽  
Light Emission ◽  
Emission Spectra ◽  
Semiconductor Quantum Dots ◽  
Broad Absorption ◽  
Light Emitting ◽  
Simultaneous Excitation ◽  
New Class ◽  
Cellular Events ◽  
Optical And Electronic Properties

Semiconductor quantum dots (QDs) are tiny light-emitting particles that have emerged as a new class of fluorescent labels for biology and medicine. Compared with traditional fluorescent probes, QDs have unique optical and electronic properties such as size-tuneable light emission, narrow and symmetric emission spectra, and broad absorption spectra that enable the simultaneous excitation of multiple fluorescence colours.

scholarly journals Spectrographic Microfluidic Memory

2005 ◽  
Author(s):  
David Erickson ◽  
Baiyang Li ◽  
James R. Adleman ◽  
Saurabh Vyawahare ◽  
Stephen Quake ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Recent Work ◽  
Data Storage ◽  
Emission Spectra ◽  
Semiconductor Quantum Dots ◽  
Excitation Wavelength ◽  
Data Encoding ◽  
New Class ◽  
Multiple Species ◽  
Tunable Emission

Recent advancements in micro- and nanoscale fluidic manipulation have enabled the development of a new class of tunable optical structures which are collectively referred to as optofluidic devices. In this paper we will introduce our recent work directed towards the development of a spectrographic optofluidic memory. Data encoding for the memory is based on creating spectrographic codes consisting of multiple species of photoluminescent nanoparticles at discrete intensity levels which are suspended in liquids. The data cocktails are mixed, delivered and stored using a series of soft and hard-lithography microfluidic structures. Semiconductor quantum dots are ideally suited for this application due to their narrow and size tunable emission spectra and consistent excitation wavelength. Both pressure driven and electrokinetic approaches to spectral code writing have been developed and will be experimentally demonstrated here. Novel techniques for data storage and readout are also discussed and demonstrated.

Semiconductor Quantum Dots for Multicolor Fluorescence Imaging and Spectroscopy of Single Cancer Cells

2003 ◽  
Vol 773 ◽  
Author(s):  
Xiaohu Gao ◽  
Shuming Nie ◽  
Wallace H. Coulter
Keyword(s):  
Quantum Dots ◽  
Cancer Cells ◽  
Fluorescence Imaging ◽  
Organic Dyes ◽  
Fluorescent Proteins ◽  
Single Cells ◽  
Quantitative Imaging ◽  
Semiconductor Quantum Dots ◽  
Single Cancer ◽  
Imaging And Spectroscopy

AbstractLuminescent quantum dots (QDs) are emerging as a new class of biological labels with unique properties and applications that are not available from traditional organic dyes and fluorescent proteins. Here we report new developments in using semiconductor quantum dots for quantitative imaging and spectroscopy of single cancer cells. We show that both live and fixed cells can be labeled with multicolor QDs, and that single cells can be analyzed by fluorescence imaging and wavelength-resolved spectroscopy. These results raise new possibilities in cancer imaging, molecular profiling, and disease staging.

Hot Topic and Challenge of Semiconductor Quantum Dots as Fluorescence Labels*

2010 ◽  
Vol 37 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Chang-Yan LI ◽  
Qian LI ◽  
Hai-Tao LIU ◽  
Jun ZHANG ◽  
DAMIRIN Aletangaole
Keyword(s):  
Quantum Dots ◽  
Semiconductor Quantum Dots
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