Highly Fluorescent and Stable Quantum Dot-Polymer-Layered Double Hydroxide Composites
SCIE
SCOPUS
- Title
- Highly Fluorescent and Stable Quantum Dot-Polymer-Layered Double Hydroxide Composites
- Authors
- Seungho Cho; Jungheon Kwag; Sanghwa Jeong; Yeonggyeong Baek; Kim, S
- Date Issued
- 2013-04-09
- Publisher
- AMER CHEMICAL SOC
- Abstract
- We report a designed strategy for a synthesis of highly luminescent and photostable composites by incorporating quantum dots (QDs) into layered double hydroxide (LDH) matrices without deterioration of a photoluminescence (PL) efficiency of the fluorophores during the entire processes of composite formations. The QDs synthesized in an organic solvent are encapsulated by polymers, poly(maleic acid-alt-octadecene) to transfer them into water without altering the initial surface ligands. The polymer-encapsulated QDs with negative zeta potentials (-29.5 +/- 2.2 mV) were electrostatically assembled with positively charged (24.9 +/- 0.6 mV) LDH nanosheets to form QD-polymer-LDH composites (PL quantum yield: 74.1%). QD-polymer-LDH composite films are fabricated by a drop-casting of the solution on substrates. The PL properties of the films preserve those of the organic QD solutions. We also demonstrate that the formation of the QD-polymer-LDH composites affords enhanced photostabilities through multiple protections of QD surface by polymers and LDH nanosheets from the environment.
- Keywords
- quantum dot; photoluminescence quantum yield; amphiphilic polymer encapsulation; layered double hydroxide; photostability; LIGHT-EMITTING-DIODES; GOLD NANOPARTICLES; WATER; NANOCOMPOSITES; NANOCRYSTALS; DELAMINATION; NANOSHEETS; EMISSION; PHOTOLUMINESCENCE; EXCHANGE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15219
- DOI
- 10.1021/CM3040505
- ISSN
- 0897-4756
- Article Type
- Article
- Citation
- CHEMISTRY OF MATERIALS, vol. 25, no. 7, page. 1071 - 1077, 2013-04-09
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