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Versatile H2O2-driven mixed aerogel synthesis from CdTe and bimetallic noble metal nanoparticles
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2017
- Publisher :
- Royal Society of Chemistry (UK), 2017.
-
Abstract
- Mixed aerogels from semiconductor and metal nanoparticles represent an outstanding hybrid material with exceptional properties due to two striking advantages: the creation of a huge quantity of semiconductor-metal interfaces combined with a highly porous three-dimensional nanostructured network. We present a versatile synthetic pathway towards hybrid aerogels built up by joint gelation of CdTe and noble metal nanoparticles (Au, Pd and bimetallic Au/Pd). A straightforward HO treatment inducing gel formation is developed as a more elegant alternative compared to the established photooxidation approach. The use of HO allows a reproducible, simple and mild gel formation which can be easily upscaled. The tremendous influence of the HO concentration on gelation mechanism and gelation kinetics is revealed by photoluminescence quantum yield (PLQY) determinations. Resulting gels are extensively characterized via transmission electron microscopy (TEM), scanning TEM (STEM), energy dispersive X-ray analysis (EDX) as well as photoluminescence (PL) spectroscopy and PL lifetime measurements. By varying the composition of the herein presented noble metal nanoparticles in a controlled fashion the range of semiconductor-metal hybrid aerogels is widened, which demonstrates the versatility and consistency of our approach. This synthetic flexibility grants access to a variety of different mixed hybrid aerogels which are of high significance for catalytic, sensing and photonic applications.<br />Parts of TEM investigations have been carried out at the Leibniz-Institut für Polymerforschung Dresden e.V. Access to their TEM facility is gratefully acknowledged. AD thanks the Government of the Russian Federation (Grant 074-U01) through ITMO Post-Doctoral Fellowship.
- Subjects :
- Materials science
Photoluminescence
business.industry
Nanoparticle
Nanotechnology
Aerogel
02 engineering and technology
General Chemistry
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Semiconductor
Transmission electron microscopy
Materials Chemistry
engineering
Noble metal
0210 nano-technology
Hybrid material
business
Bimetallic strip
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Accession number :
- edsair.doi.dedup.....9c8225f8220276aeca675fa0c57804cc