Of the II-VI materials, cadmium telluride (CdTe) has received a large amount of
attention, particularly in materials that are fabricated with colloidal synthetic
methods. Quantum dots or nanocrystals are nanoscale semiconductor materials
Author: John Donegan
Publisher: CRC Press
In the last two decades, semiconductor quantum dots—small colloidal nanoparticles—have garnered a great deal of scientific interest because of their unique properties. Among nanomaterials, CdTe holds special technological importance as the only known II–VI material that can form conventional p–n junctions. This makes CdTe very important for the development of novel optoelectronic devices such as light-emitting diodes, solar cells, and lasers. Moreover, the demand for water-compatible light emitters and the most common biological buffers give CdTe quantum dots fields a veritable edge in biolabeling and bioimaging. Cadmium Telluride Quantum Dots: Advances and Applications focuses on CdTe quantum dots and addresses their synthesis, assembly, optical properties, and applications in biology and medicine. It makes for a very informative reading for anyone involved in nanotechnology and will also benefit those scientists who are looking for a comprehensive account on the current state of quantum dot–related research.
Abstract: The size‐dependent optical properties of quantum dots (QDs) are frequently exploited for use in medical imaging and labelling applications.
Abstract: The size‐dependent optical properties of quantum dots (QDs) are frequently exploited for use in medical imaging and labelling applications. Similarly, presented here, they also elicit profound size‐dependent anticoagulant properties. Cadmium telluride quantum dot (QDs) (3.2nm) were shown to have a dramatic anticoagulant effect centred on around the intrinsic coagulation pathway, compared to their 3.6 nm counterparts. Several clinically relevant diagnostic tests were carried out over a concentration range of the QDs and demonstrated that the 3.2 nm QDs elicited their response on the intrinsic pathway as a whole, yet the activity of the individual intrinsic coagulation factors was not affected. The mechanism appears also to be strongly influenced by the concentration of calcium ions and not cadmium ions leached from the QDs. Static and shear‐based primary haemostasis assays were also carried out, demonstrating a profound anticoagulant effect which was independent of platelets and phospholipids. The data presented here suggest that the physical–chemical properties of the QDs may have a role in the modulation of haemostasis and the coagulation cascade, in a yet not fully understood mechanism. This study has implications for the use of similar QDs as diagnostic or therapeutic tools in vivo, and for the occupational health and safety of those working with such materials. Abstract : Cadmium telluride quantum dots (3.2nm) exhibit a profound anticoagulant response centred on the intrinsic pathway. The mechanism appears also to be strongly influenced by the concentration of calcium ions and not the presence of cadmium ions.
Absorption spectrum for a sample of CdTe quantum dots in a glass matrix . The
dots have average radius of 3 . 1 nm . QWH27 Fig . 2 . Bleaching recovery for CdTe quantum dots excited at the 15 - 1S transition . The average dot radius is 2 .
Differences in subcellular distribution and toxicity of green and red emitting CdTe quantum dots . J Mol Med 83 : 377-385 . Lovric J , Cho SJ , Winnik FM ,
Maysinger D. 2005b . Unmodified cadmium telluride quantum dots induce
Cadmium telluride ( CdTe ) quantum dots , with a diameter of approximately 3nm
, were synthesized then rendered water ... CdTe quantum dots may be imaged
and excited at nearinfrared wavelengths , depending on the size of the dot . CdTe
Ann Rev Biomed Eng 7: 55–76  Byrne SJ, Corr SA, Rakovich TY, Gunko YK,
Rakovich YP, Donegan JF, Mitchell S, Volkov Y (2006) Optimisation of the
synthesis and modification of CdTe quantum dots for enhanced live cell imaging.
Author: Andrey Rogach
Publisher: Springer Science & Business Media
Category: Technology & Engineering
This is the first book to specifically focus on semiconductor nanocrystals, and address their synthesis and assembly, optical properties and spectroscopy, and potential areas of nanocrystal-based devices. The enormous potential of nanoscience to impact on industrial output is now clear. Over the next two decades, much of the science will transfer into new products and processes. One emerging area where this challenge will be very successfully met is the field of semiconductor nanocrystals. Also known as colloidal quantum dots, their unique properties have attracted much attention in the last twenty years.
Peptide Coating of Near Infrared CdTe / CdSe / Zns Quantum Dots Various types
of qdots emitting in the NIR region have ... Among them , Cadmium telluride ( CdTe ) qdots are sen semiconductor nanocrystals that have size dependant ...
We investigated iodine doping in mercury cadmium telluride (Hgi_ , Cd.Te)
grown by direct alloy growth using metalorganic ... We introduce a new concept
to directly synthesize IH-V semiconductor quantum-wire and quantum-dot
300 m Figure 3 - Transmission electronic microscopy image of as - prepared CdTe quantum dots . Scale bar : 100 nm . 2 . 3 . FUNCTIONALIZATION WITH
GLUCOSE A 0 , 01M glucose ( Sigma ) solution was prepared in aqueous
medium and ...
Author: Deutsche Gesellschaft für Kristallographie. JahrestagungPublish On: 1995
HREM CHARAKTERISIERUNG VON KLEINEN CdTe TEILCHEN H . Hofmeister ,
R . Hillebrand und W . Neumann Max ... High - resolution electron microscopy
and microanalysis of CdS and CdTe quantum dots in glass matrices , Phil . Mag .
Author: Deutsche Gesellschaft für Kristallographie. Jahrestagung
A new nanobiosensor for glucose based on the FRET between concanavalin A (
ConA)modified CdTe quantum dots and B-CD-modified gold nanoparticles has
been recently reported . Quantum dots such as CdS, CdTe, and ZnS ...
Author: Binghe Wang
Publisher: John Wiley & Sons
A thorough, accessible, and general overview of chemosensors Providing a comprehensive overview of chemosensors—organic molecules designed to bind and sense small molecules or metal ions—and their applications, Chemosensors: Principles, Strategies, and Applications is an accessible one-stop resource for analysts, clinicians, and graduate students studying advanced chemistry and chemosensing. Chemosensors function on a molecular level, generating a signal upon binding. The book reviews their synthesis, design, and applications for detecting biological and organic molecules as well as metal ions. The text highlights applications in drug discovery and catalyses that have not been well covered elsewhere. Covering such topics as molecular recognition, detection methods, design strategies, and important biological issues, the book is broken into four sections that examine intermolecular interactions, strategies in sensor design, detection methods, and case studies in metal, saccharide, and amino acid sensing. An indispensable source of information for chemical and biomedical experts using sensors, Chemosensors includes case studies to make the material both accessible and understandable to chemists of all backgrounds.
47 Hohng , S . and Ha , T . ( 2004 ) Near - complete suppression of quantum dot
blinking in ambient conditions . ... Biju , V . and Isikawa , M . ( 2007 ) Optical and
dynamic properties of water - soluble highly luminescent CdTe quantum dots .
X - ray power diffraction data obtained from pure CdSe , pure CdTe , and alloyed
CdSej - Tex quantum dots . The size of all dots was approximately 5 nm in
diameter , and the asterisk ( * ) indicates a spurious signal . 0.60 0 15 60 75 ( c )
30 45 ...
2009); quantum dot-fluorescence resonance energy transfer based nanosensor
for witches' broom disease of lime caused by ... 1.15a cadmium telluride quantum dots were multicolorcoded microspheres that have quantum dots of different ...
Author: K M Gothandam
Category: Technology & Engineering
This book reviews advanced nanotechnology in food, health, water and agriculture. In food, nanobiosensors display an unprecedented efficiency for the detection of allergens, genetically modified organisms and pathogens. In agriculture, nanofertilisers improve plant nutrition by releasing nutrients slowly and steadily. Nanomaterials synthesised using biomass such as fungi are further found remarkable to clean waters polluted by heavy metals. However, as newly introduced materials in the environment, nanoparticles may exhibit toxic effects, which are reviewed in this book. In the context of climate change, methods for water desalinisation are also presented.
Introduction electro - optic ( EO ) sampling configuration , unless otherwise Cadmium telluride ( CdTe ) is a compound semiconductor ... 4 and 88 for quantum dots with a long spin relaxation time , a uJ / cm2 ) , while probe power is
kept at 2 .
Exchange interaction effects on excitons and biexcitons in single CdTe quantum dots L. Besombes1*, K. Kheng1, L. Marsal2, H. Mariette2 1 CEA-Grenoble,
Departement de Recherche Fondamentale sur la Matiere Condensee / SP2M, ...