Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 19, Pages 10007-10012Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp400572z
Keywords
-
Funding
- NSFC [21203045, 21101041, 21003029, 21071037, 91122002]
- Fundamental Research Funds for the Central Universities [HIT. NSRIF. 2010065, HIT. NSRIF. 2011017, HIT.BRETIII. 201223]
Ask authors/readers for more resources
We demonstrate the use of amino acids as directing agents to synthesize hierarchical silver microspheres assembled by nanosheets with well morphologies, in the absence of any other surfactants or capping agents. This fabrication method avoids the absorption of macromolecules and enables clean surface on the Ag microspheres. The chemical nature of the amino acids plays a vital role in the hierarchical structure of the Ag microspheres. As found, amino acids with simple structures and 2-3 carbon atoms like alanine and glycine lead to more loosely packed Ag microspheres, and those with more complicated structures and more carbon atoms, e.g. glycine, glutamine, and asparagine, result in close packed Ag particles assembled by thinner nanosheets. By adjusting the concentration of AgNO3 solution, size as well as the surface roughness of the Ag microspheres can be well controlled. Individual particles of the constructed hierarchical Ag microspheres with highly roughened surface can act as sensitive SERS platforms. Detection of chemical molecules and monitoring of the plasmon-driven chemical reactions have been carried out through a single particle SERS technique.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available