Characterization of individual ag nanoparticles and their chemical environment. Academic Article uri icon

abstract

  • Silver nanoparticles (NPs) of approximately 5 nm diameter deposited in a single layer on glycine were examined with cluster secondary ion mass spectrometry (SIMS) in the event-by-event bombardment-detection mode. The projectiles used were Au(3)(+), C(60)(+), and Au(400)(4+) with impact energies of 34, 26, and 136 keV, respectively. The highest secondary ion yields were obtained with Au(400)(4+). The method presented can test single or multilayer organization and determine surface coverage. NPs are identified one-by-one for chemical composition. Chemical and physical information in a nonimaging mode was resolved at approximately 10 nm. Grazing vs direct impacts on NPs were identified and quantified. NP fragmentation from direct impacts with Au(400)(4+) and C(60)(+) was observed for the first time.

published proceedings

  • Anal Chem

author list (cited authors)

  • Rajagopalachary, S., Verkhoturov, S. V., & Schweikert, E. A.

citation count

  • 20

complete list of authors

  • Rajagopalachary, Sidhartharaja||Verkhoturov, Stanislav V||Schweikert, Emile A

publication date

  • February 2009