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In Situ Electron Microscopy of Plasmon-Mediated Nanocrystal Synthesis
- Source :
- Journal of the American Chemical Society. 139(19)
- Publication Year :
- 2017
-
Abstract
- Chemical processes driven by nonthermal energy (e.g., visible light) are attractive for future approaches to energy conversion, synthesis, photocatalysis, and so forth. The growth of anisotropic metal nanostructures mediated by excitation of a localized surface plasmon resonance (LSPR) is a prototype example of such a reaction. Important aspects, notably the growth mechanism and a possible role of plasmonic “hot spots” within the metal nanostructures, remain poorly understood. Here, we use in situ electron microscopy to stimulate and image the plasmon-mediated growth of triangular Ag nanoprisms in solution. The quantification of the time-dependent evolution of the lateral size and thickness of the nanoprisms, enabled by nanometer-scale real-time microscopy in solution, shows a transition from an early stage of uniform Ag0 incorporation exclusively in the prism side facets to a size regime with accelerated growth in thickness. Differences in attachment rate at this advanced stage correlate with local plasm...
- Subjects :
- Chemistry
Nanotechnology
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Biochemistry
Catalysis
0104 chemical sciences
Colloid and Surface Chemistry
Nanocrystal
Microscopy
Photocatalysis
Energy transformation
Prism
Surface plasmon resonance
0210 nano-technology
Plasmon
Visible spectrum
Subjects
Details
- ISSN :
- 15205126
- Volume :
- 139
- Issue :
- 19
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society
- Accession number :
- edsair.doi.dedup.....1788b0a27d907168ff419613586f35de