tailieunhanh - báo cáo khoa học: "Blue shift of CdSe/ZnS nanocrystal-labels upon DNA-hybridization"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Blue shift of CdSe/ZnS nanocrystal-labels upon DNA-hybridization | Journal of Nanobiotechnology BioMed Central Research Blue shift of CdSe ZnS nanocrystal-labels upon DNA-hybridization Jurgen Riegler 1 3 Franck Ditengou 2 Klaus Palme2 and Thomas Nann 3 Open Access Address Fraunhofer Institute for Interfacial Engineering and Biotechnology Nobelstrasse 12 70569 Stuttgart Germany institute of Biology II Botany Faculty of Biology Albert-Ludwig University Freiburg Schanzlestr. 1 79104 Freiburg Germany and 3School of Chemical Sciences and Pharmacy University of East Anglia Norwich Research Park Norwich NR4 7TJ UK Email Jurgen Riegler - Franck Ditengou - Klaus Palme - Thomas Nann - Corresponding author fEqual contributors Published 19 May 2008 Received 6 December 2007 Journal of Nanobiotechnology 2008 6 7 doi l477-3l55-6-7 Accepted 19 May 2008 This article is available from http content 6 l 7 2008 Riegler et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Luminescence color multiplexing is one of the most intriguing benefits which might occur by using semiconductor Quantum Dots QDs as labels for biomolecules. It was found that the luminescence of QDs can be quenched and replaced by a luminescence peak at approximately 460 nm on hybridization with certain regions of Arabidopsis thaliana tissue. This effect is site selective and it is unclear whether it occurs due to an energy transfer process or due to quenching and scattering of the excitation light. The article describes methods for phase-transfer of differently coloured hydrophobically ligated QDs