Semiconductor CdS:Mn/ZnS quantum dots for sensing applications

机译：半导体CdS：Mn / ZnS量子点用于传感应用

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Since past several years, quantum dot (Qdot) nanotechnology has advanced our capabilities towards sensitive and reliable imaging of biological specimens such as cells, tissues etc. It is well understood that surface passivation is extremely important in obtaining bright and photostable Qdots. Traditionally, an inorganic wide band-gap epitaxially-matched shell material (such as ZnS, ZnSe etc.) is used over the Qdot core (such as CdS, CdSe etc.). Surface passivation minimizes surface related defects and improves quantum efficiency as well as photostability. This is also applicable to dopant based Qdots such as CdS:Mn/ZnS Qdots. In this work we present our research data on CdS:Mn/ZnS Qdots that are further surface modified with appropriate organic ligands for selective sensing applications. These ligands are capable of quenching Qdot luminescence via electron transfer process. Qdot luminescence is restored when electron transfer process is blocked. Using this quenching mechanism, we have demonstrated selective sensing of cadmium ions, alkali metal ions and glutathione in a highly sensitive manner.

机译：自过去几年以来，量子点（Qdot）纳米技术已使我们的能力朝着对诸如细胞，组织等生物标本的敏感和可靠成像发展的能力。众所周知，表面钝化对于获得明亮且光稳定的Qdot至关重要。传统上，无机宽带隙外延匹配的壳材料（例如ZnS，ZnSe等）用于Qdot核（例如CdS，CdSe等）上。表面钝化可最大程度地减少与表面相关的缺陷，并提高量子效率和光稳定性。这也适用于基于掺杂剂的Qdot，例如CdS：Mn / ZnS Qdot。在这项工作中，我们介绍了有关CdS：Mn / ZnS Qdots的研究数据，这些数据已通过适当的有机配体进行了表面改性，以用于选择性传感应用。这些配体能够通过电子转移过程猝灭Qdot发光。当电子转移过程受阻时，Qdot发光恢复。使用这种淬灭机制，我们已经以高度灵敏的方式展示了对镉离子，碱金属离子和谷胱甘肽的选择性感测。

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来源
《Smart biomedical and physiological sensor technologies VII》|2010年|P.767403.1-767403.7|共7页
会议地点 Orlando FL(US)
作者
Subhash Banerjee; rnSwadeshmukul Santra;
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作者单位

NanoScience Technology Center, Department of Chemistry and Biomolecular Science Center, University of Central Florida 12424 Research Parkway, Suite 400, Orlando, FL;

rnNanoScience Technology Center, Department of Chemistry and Biomolecular Science Center, University of Central Florida 12424 Research Parkway, Suite 400, Orlando, FL;

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原文格式 PDF
正文语种 eng
中图分类医用物理学;
关键词
quantum dots; surface passivation; organic ligands; hybrid qdots; sensing; alkali metal (Na~+, K~+) ions; alkaline metal (Ca~(2+)) ions;

机译：量子点;表面钝化；有机配体混合点感应碱金属（Na〜+，K〜+）离子;碱金属（Ca〜（2+））离子;

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专利

1. Electron states in CdMnSe/ZnSe and in CdSe/ZnMnSe diluted magnetic semiconductor quantum dots [J] . M. Triki, S. Ben Afia, S. Jaziri Physica status solidi . 2009,第4期

机译：CdMnSe / ZnSe和CdSe / ZnMnSe稀释的磁性半导体量子点中的电子态
2. Long-lived emission in Mn doped CdS, ZnS, and ZnSe diluted magnetic semiconductor quantum dots [J] . Proshchenko Vitaly, Dahnovsky Yuri Chemical Physics: A Journal Devoted to Experimental and Theoretical Research Involving Problems of Both a Chemical and Physical Nature . 2015,第Null期

机译：锰掺杂的CdS，ZnS和ZnSe稀释的磁性半导体量子点中的长寿命发射
3. Studies on the synthesis and characterization of Zn_1â _x Cd _x S and Zn_1â _x Cd _x S:Mn2+ semiconductor quantum dots [J] . R. Sakthi Sudar Saravanana* D. Pukazhselvanb C.K. Mahadevana Philosophical Magazine . 2011,第3期

机译：Zn _{1âˆ _{x Cd _{x S和Zn _{1âˆ′ x Cd _{x S：Mn 2 + 半导体量子点}}}}}
4. Semiconductor CdS:Mn/ZnS quantum dots for sensing applications [C] . Subhash Banerjee, Swadeshmukul Santra SPIE Conference on Smart Biomedical and Physiological Densor Technology . 2010

机译：半导体CD：Mn / Zns量子点，用于传感应用
5. CdS Nanowires and CdSe/ZnS Quantum Dots Properties and Applications [D] . Poduri, Shripriya. 2015

机译：CdS纳米线和CdSe / ZnS量子点的性质和应用
6. Fluorescence Quenching of CdSe/ZnS Quantum Dots by Using Black Hole Quencher Molecules Intermediated With Peptide for Biosensing Application [O] . Sreenadh Sasidharan Pillai, Hiroshi Yukawa, Daisuke Onoshima, 2015

机译：肽介导的黑洞猝灭分子对CdSe / ZnS量子点的荧光猝灭在生物传感中的应用
7. Irreversible Temperature Quenching and Antiquenching of Photoluminescence of ZnS/CdS:Mn/ZnS Quantum Well Quantum Dots [O] . Ding, X., Dai, R. C., Zhao, Z., 2013

机译：不可逆温度淬火和反淬火 Zns / Cds：mn / Zns量子阱量子点的光致发光

Semiconductor CdS:Mn/ZnS quantum dots for sensing applications

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