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6973.pdf (22.29 MB)
ETD Abstract Container
Abstract Header
Effect of Metal Coating on NaYF
4
:Yb
3+
,Tm
3+
Upconversion Nanoparticles
Author Info
Alazemi, Abdulrahman Miteb
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1394724900
Abstract Details
Year and Degree
2014, MS, University of Cincinnati, Arts and Sciences: Chemistry.
Abstract
Upconversion is the process in which two or more low-energy photons are absorbed and emitted as one high-energy photon. This research reports on the effect of layer-by-layer polyelectrolytes and silver coating on hexagonal NaYF
4
:Yb
3+
,Tm
3+
in an attempt to enhance the upconversion intensity. The synthesized upconversion nanoparticles were separated into two, ~140 nm and a mixture of two populations, ~250 nm and ~25 nm. The former case observed enhancement, when silver coated on the upconversion nanoparticles using hydroquinone as the reducing agent, with no layers and with several layers (three, four and five) of polyelectrolytes. The size (140 nm) and morphology of the hexagonal NaYF
4
:Yb
3+
,Tm
3+
were similar. The enhancement was confirmed when sodium cyanide was added to remove the silver coating from the sample resulting in a decrease in the upconversion intensity. Quenching was observed in the latter case, when silver coating was unsuccessful and that there are two populations of upconversion nanoparticles (large ~250 nm and small ~25 nm).
Committee
Laura Sagle, Ph.D. (Committee Chair)
Peng Zhang, Ph.D. (Committee Chair)
Allan Pinhas, Ph.D. (Committee Member)
Pages
43 p.
Subject Headings
Chemistry
Keywords
Upconversion
;
Nanoparticles
;
Polyelectrolytes
;
Enhancement
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RIS
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Citations
Alazemi, A. M. (2014).
Effect of Metal Coating on NaYF
4
:Yb
3+
,Tm
3+
Upconversion Nanoparticles
[Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1394724900
APA Style (7th edition)
Alazemi, Abdulrahman.
Effect of Metal Coating on NaYF
4
:Yb
3+
,Tm
3+
Upconversion Nanoparticles.
2014. University of Cincinnati, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1394724900.
MLA Style (8th edition)
Alazemi, Abdulrahman. "Effect of Metal Coating on NaYF
4
:Yb
3+
,Tm
3+
Upconversion Nanoparticles." Master's thesis, University of Cincinnati, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1394724900
Chicago Manual of Style (17th edition)
Abstract Footer
Document number:
ucin1394724900
Download Count:
455
Copyright Info
© 2014, some rights reserved.
Effect of Metal Coating on NaYF
4
:Yb
3+
,Tm
3+
Upconversion Nanoparticles by Abdulrahman Miteb Alazemi is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.