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|
| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-253 |
| Subject |
Electrostatic self-assembly of Au nanoparticles and Y2SiO5:Pr3+ to enhance the photochromic response of H3PW12O40 |
| Authors |
Edgardo Gabriel Santoro, YOUNG SOO KANG*
Department of Chemistry, Sogang University, Korea
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| Abstract |
Photochromic materials like H3PW12O40 (HPW) change their optical absorption, modifying the molecular structure or oxidation states when they are expose to UV-light. The amount of this radiation in the solar spectrum is one the main restraints for the uses of photochromic materials in technological applications [1]. Up conversion materials (UCM) can be used to increase the UV light region in electromagnetic spectrum. The UCM will be utilized visible or IR radiation and converted into useful UV light radiation [2]. Furthermore, wave amplifier concept can enhance the amount of the converted UV light [3]. In this research, Y2SiO5:Pr3+ (YSO:Pr3+) is used to form an electrostatic self-assembly with AuNp[4], and later on deposited over a photochromic film of HPW. YSO:Pr3+ is an up-conversion silicate with excellent visible light transparency, good thermal and chemical resistance, and transform part of the visible light into UV light[2]. AuNp present a localized surface plasmon resonance capable to amplifies the converted light of the UCM [3]. Nanoparticles of YSO:Pr3+ were synthesized by hydrothermal method, superficially charge with a cationic surfactant and combined with citrate-stabilized AuNp synthesized to form an electrostatic self-assembly over a film of HPW.
(1) Suzuko Yamazaki*, Hiroki Ishida, Dai Shimizu, and Kenta Adachi. Photochromic Properties of Tungsten Oxide/Methylcellulose Composite Film Containing Dispersing Agents, ACS Appl. Mater. Interfaces, 2015, 7 (47), pp 26326-26332
(2) Cates, E.; Li, F. Balancing intermediate state decay rates for efficient Pr3+ visible-to-UVC up conversion: the case of b-Y2Si2O7:Pr3+. RSC Adv., 2016, 6, 22791
(3) Chang Woo Kim, Tae Young Eom, In Seok Yang, Byung Su Kim, Wan In Lee, Yong Soo Kang & Young Soo Kang. Dual-Function Au@Y2O3:Eu3+ Smart Film for Enhanced Power Conversion Efficiency and Long-Term Stability of Perovskite Solar Cells. Scientific reports, volume 7, article number 6849 (2017).
(4) Stoyan K. Kyle J. M. Bishop, Bartlomiej Kowalczyk, Alexander M. Kalsin and Bartosz A. Grybowski. Electrostatically "Patchy" Coating via cooperative absorption of charged nanoparticles. J.AM. CHEM. SOC. 2007, 129, 15623-15630
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| E-mail |
gabrielsantoro87@hotmail.com |
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121st General Meeting of the KCS