Document Detail


Improving correlated SERS measurements with scanning electron microscopy: an assessment of the problem arising from the deposition of amorphous carbon.
MedLine Citation:
PMID:  23416796     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
For surface-enhanced Raman scattering (SERS) substrates with nonspherical symmetry, it is critical to correlate spectroscopy measurements with imaging by scanning electron microscopy (SEM). However, the deposition of carbon resulting from e-beam exposure during SEM imaging contaminates the surface of nanoparticles, potentially preventing their further functionalization with Raman probe molecules. In addition, the deposited carbon leads to unwanted background SERS signals. In this study, we systematically investigated the deposition of carbon during SEM imaging and examined how it affects the functionalization of nanoparticles with probe molecules and impacts the detection of SERS signals. Significantly, we found that the carbon could be removed or replaced from the surface of Ag nanoparticles through chemical or physical means, rendering the nanoparticles the capability for correlated SEM/SERS studies.
Authors:
Christine H Moran; Xiaohu Xia; Younan Xia
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physical chemistry chemical physics : PCCP     Volume:  15     ISSN:  1463-9084     ISO Abbreviation:  Phys Chem Chem Phys     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-03-20     Completed Date:  2013-09-10     Revised Date:  2014-04-22    
Medline Journal Info:
Nlm Unique ID:  100888160     Medline TA:  Phys Chem Chem Phys     Country:  England    
Other Details:
Languages:  eng     Pagination:  5400-6     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Carbon / chemistry*
Metal Nanoparticles / chemistry
Microscopy, Electron, Scanning*
Silver / chemistry
Spectrum Analysis, Raman*
Sulfhydryl Compounds / chemistry
Grant Support
ID/Acronym/Agency:
1R01 CA138527/CA/NCI NIH HHS; R01 CA138527/CA/NCI NIH HHS
Chemical
Reg. No./Substance:
0/Sulfhydryl Compounds; 3M4G523W1G/Silver; 6L2WW9XYZO/4-methylbenzenethiol; 7440-44-0/Carbon
Comments/Corrections

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