Facile fabrication of two-dimensional inorganic nanostructures and their conjugation to nanocrystals
SCIE
SCOPUS
- Title
- Facile fabrication of two-dimensional inorganic nanostructures and their conjugation to nanocrystals
- Authors
- Seungho Cho; Ji-Wook Jang; Juwon Park; Jung, S; Sungwook Jung; Jungheon Kwag; Jae Sung Lee; Kim, S
- Date Issued
- 2013-05
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Nanocomposites of two-dimensional (2D) inorganic nanosheets and inorganic nanocrystals are fabricated. Freestanding atomically flat gamma-AlOOH nanosheets (thickness <1 nm) are synthesized from a one-pot hydrothermal reaction. The freestanding and binder-free film composed of the gamma-AlOOH nanosheets is fabricated by sedimentation. Because they have positive zeta potentials in the pH range below ca. 9.3, the gamma-AlOOH nanosheets can function as positively charged 2D inorganic matrices in a broad pH range. By solution phase (pH 7.0) mixing of the gamma-AlOOH nanosheets (zeta potential: 30.7 +/- 0.8 mV) and inorganic nanocrystals with negative surface charge, including Au nanoparticles, Au nanorods, CdSe quantum dots, CdSe/CdS/ZnS quantum dots and CdSe nanorods, the nanocomposites are self-assembled via electrostatic interactions. Negatively charged inorganic nanostructures with a wide range of chemical compositions, shapes, sizes, surface ligands and adsorbates can be used as building blocks for gamma-AlOOH nanocomposites. Adsorption densities of inorganic nanocrystals on the nanocomposites can be controlled by varying concentrations of nanocrystal solutions. Nanocomposite films containing alternating layers of gamma-AlOOH and nanocrystals are obtained by a simple drop casting method.
- Keywords
- LAYERED DOUBLE HYDROXIDE; QUANTUM DOTS; SEMICONDUCTOR NANOCRYSTALS; ALUMINA CERAMICS; ULTRATHIN FILMS; GAMMA-ALUMINA; THIN-FILMS; BOEHMITE; NANOSHEETS; EXFOLIATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15214
- DOI
- 10.1039/C3TC30756E
- ISSN
- 2050-7526
- Article Type
- Article
- Citation
- The Journal of Physical Chemistry C, vol. 1, no. 29, page. 4497 - 4504, 2013-05
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