Doping the quantum dots is one of the most emerging hot topics. In addition to the enhancement of the optical properties of the quantum dots, it also improve the chemical stability and inhibit the self quenching effect in the undoped quantum dots. In addition to that, It opened the field of using non Cadmium based quantum dots, that will be very useful for various biological applications.

1. Doping the Quantum dots
 Ahmad Mohamed
 Id:800120080
Depts.washington.edu rsc.org

2. Doping the quantum dots
 Introduction
 Doping the quantum dot
1. why we dope the quantum dot?
2. Barriers that can prevent the doping process.
3. Chemical synthesis of the doped quantum dots.

3. Quantum dots
http://pubs.acs.org/cen/news/87/i20/8720news4.html

4. Introduction
www.wikipedia.com

5. Introduction
Yi Xu. Investigation of synthesis of doped, and core/shell nanocrystals. Master of Science thesis for
Master Program, Materials and Nanotechnology. Chalmers University for
technology, Gotenberg, sweden, 2010.

6. Doping
http://quantum.ep.nctu.edu.tw/index.php?lang=e&a=4&b=2

7. Doping
Tran Thi Quynh Hoa , Ngo Duc The, Stephen McVitie, Nguyen Hoang Nama, Le Van Vu, Ta Dinh Canh,
Nguyen Ngoc Long.Optical properties of Mn-doped ZnS semiconductor nanoclusters synthesized
by a hydrothermal process. Optical Materials 33 (2011) 308–314.

8. Doping
Tran Thi Quynh Hoa , Ngo Duc The, Stephen McVitie, Nguyen Hoang Nama, Le Van Vu, Ta Dinh
Canh,Nguyen Ngoc Long.Optical properties of Mn-doped ZnS semiconductor nanoclusters
synthesized by a hydrothermal process. Optical Materials 33 (2011) 308–314.

9. Doping
 Factors that affect the doping process:
1. Thermodynamic.
2. Kinetic.
3. Self Purification.
4. Dopant concentration.

10. Thermodynamic Factor:
Radius
CHRISTOPHER J TUINENGA. INDIUM, TIN, AND GALLIUM DOPED CDSE QUANTUM DOTS.
,KANSAS STATE UNIVERSITY. Manhattan, Kansas,2011.

11. Kinetic Factor:
Binding energy
ev
CHRISTOPHER J TUINENGA. INDIUM, TIN, AND GALLIUM DOPED CDSE QUANTUM DOTS.
,KANSAS STATE UNIVERSITY. Manhattan, Kansas,2011.

12. Self Purification:
CHRISTOPHER J TUINENGA. INDIUM, TIN, AND GALLIUM DOPED CDSE QUANTUM DOTS. ,KANSAS
STATE UNIVERSITY. Manhattan, Kansas,2011.

13. Dopant Concentration:
Tran Thi Quynh Hoa , Ngo Duc The, Stephen McVitie, Nguyen Hoang Nama, Le Van Vu, Ta Dinh
Canh,Nguyen Ngoc Long.Optical properties of Mn-doped ZnS semiconductor nanoclusters
synthesized by a hydrothermal process. Optical Materials 33 (2011) 308–314.

14. Chemical Synthesis:
CHRISTOPHER J TUINENGA. INDIUM, TIN, AND GALLIUM DOPED CDSE QUANTUM DOTS.
,KANSAS STATE UNIVERSITY. Manhattan, Kansas,2011.

15. Characterization:
Tran Thi Quynh Hoa , Ngo Duc The, Stephen McVitie, Nguyen Hoang Nama, Le Van Vu, Ta Dinh
Canh,Nguyen Ngoc Long.Optical properties of Mn-doped ZnS semiconductor nanoclusters
synthesized by a hydrothermal process. Optical Materials 33 (2011) 308–314.

16. References:
 Qi Xiao, Chong Xiao. Synthesis and photoluminescence of water-soluble
Mn: ZnS/ZnS core/shell quantum dots using nucleation-doping strategy.
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Jiang. Aqueous synthesis and bio-imaging application of highly
luminescent and low cytotoxicity Mn2+-doped ZnSe nanocrystals.
Material letters volume 65, issue14, 31 July 2011. Pages 2139-2141.
 Tran Thi Quynh Hoa, Ngo Duc The, Stephen McVitie, Nguyen Hoang
Nam, Le Van Vu, Ta Dinh Canh, Nguyen Ngoc Long. Optical properties
of Mn-doped ZnS semiconductor nanoclusters synthesized by a
hydrothermal process. Optical Materials 33 (2011) 308–314.
 Yaping Zhang, Yuhua Shen, Xiufang Wang, Ling Zhu, Bing Han, Lanlan
Ge, Yulun Tao, Anjian Xie. Enhancement of blue fluorescence on the
ZnSe quantum dots doped with transition metal ions. Materials Letters
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17.  Lu-Wen Jiang, Jing Zhou, Xing-Zhi Yang, Xiao-Niu Peng, Hai Jiang, De-Qiang
Zhuo, Liang-Dong Chen, Xue-Feng Yu. Microwave-assisted synthesis of
surface-passivated doped ZnSe quantum dots with enhanced fluorescence.
Chemical Physics Letters 510 (2011) 135–138.
 A. Franceschetti, J. M. An, and A. Zunger. Impact Ionization Can Explain
Carrier Multiplication in PbSe Quantum Dots. Nano Letters
(2006), Vol.6, No.10, 2191-2195.
 Heesun Yang, Swadeshmukul Santra, and Paul H. Holloway. Syntheses and
Applications of Mn-Doped II-VI Semiconductor Nanocrystals. Journal of
Nanoscience and Nanotechnology, Vol.5, 1364–1375, 2005.
 Viktor Chikan. Challenges and Prospects of Electronic Doping of Colloidal
Quantum Dots: Case Study of CdSe.The Journal of Physical Chemistry Letters
2011, 2, 2783-2789.
 Cristina Blanco-Andujar, Le Duc Tung and Nguyen T. K. Thanh. Synthesis of
nanoparticles for biomedical applications. Annu. Rep. Prog. Chem., Sect.
A, 2010, 106, 553–568.

18.  Xue GAO, Guangchao Tang, Yang Li, Xingguang Su. A novel
optical nanoprobe for trypsin detection and inhibitor screening
based on Mn-doped ZnSe quantum dots. Analytica Chimica
Acta 743 (2012) 131– 136.
 Oleksandr Voznyy, David Zhitomirsky, Philipp Stadler, Zhijun
Ning, Sjoerd Hoogland, and Edward H. Sargent. A Charge-
Orbital Balance Picture of Doping in Colloidal Quantum Dot
Solids. ACS NANO, VOL. 6, NO. 9,2012.
 Tejinder Singh, T. J. Mountziaris, and Dimitrios Maroudas. First-
principles theoretical analysis of transition-metal doping of ZnSe
quantum dots. J. Appl. Phys. 112, 024301 (2012).
 J. Daniel Bryan and Daniel R. Gamelin. Doped Semiconductor
Nanocrystals: Synthesis, Characterization, Physical Properties,
and Applications. Progress in Inorganic Chemistry, 2005, vol. 54,
47-126.

19.  Hsiang-Yun Chen, Sourav Maiti, and Dong Hee Son.
Doping Location-Dependent Energy Transfer Dynamics in
Mn-Doped CdS/ZnS Nanocrystals. ACS
NANO, VOL.6, NO.1, 583-591, 2012.
 Xue Gao, Guangchao Tang, Xingguang Su. Optical
detection of organophosphorus compounds based on Mn-
doped ZnSe d-dot enzymatic catalytic sensor. Biosensors
and Bioelectronics 36 (2012) 75–80.
 Xue Gao, Hao Zhang, Yang Li, Xingguang Su. Mn-doped
ZnSe d-dots-based α-methylacyl-CoA racemase probe for
human prostate cancer cell imaging. Analytical and
Bioanalytical Chemistry .February 2012, Volume 402, Issue
5, pp 1871-1877.

20. Thank You