TY - GEN
T1 - Surface Raman spectroscopy as a probe of surface chemistry
AU - Child, C. M.
AU - Foster, Michelle
AU - Ivanecky, J. E.
AU - Perry, Scott S.
AU - Campion, Alan
PY - 1995
Y1 - 1995
N2 - Unenhanced surface Raman spectroscopy has been used to study the chemistry of polymers adsorbed on solid surfaces and the chemical enhancement mechanism of surface-enhanced Raman scattering. The adsorption and reactions of the polyimide monomers pyromellitic dianhydride (PMDA) and oxydianiline on silver, copper and silicon surfaces under ultrahigh vacuum have been investigated. These include both nondissociative physisorption and dissociative chemisorption of the monomers, and the condensation polymerization to form adsorbed polyimide. The intermediate polyamic acid is detected for the first time in a surface experiment. PMDA adsorbed on Cu(111) shows chemical enhancement in the absence of electromagnetic enhancement. High resolution electron energy loss spectroscopy has revealed a strong charge transfer absorption near the Raman excitation frequency. This observation provides strong support for a proposed resonance Raman chemical enhancement mechanism.
AB - Unenhanced surface Raman spectroscopy has been used to study the chemistry of polymers adsorbed on solid surfaces and the chemical enhancement mechanism of surface-enhanced Raman scattering. The adsorption and reactions of the polyimide monomers pyromellitic dianhydride (PMDA) and oxydianiline on silver, copper and silicon surfaces under ultrahigh vacuum have been investigated. These include both nondissociative physisorption and dissociative chemisorption of the monomers, and the condensation polymerization to form adsorbed polyimide. The intermediate polyamic acid is detected for the first time in a surface experiment. PMDA adsorbed on Cu(111) shows chemical enhancement in the absence of electromagnetic enhancement. High resolution electron energy loss spectroscopy has revealed a strong charge transfer absorption near the Raman excitation frequency. This observation provides strong support for a proposed resonance Raman chemical enhancement mechanism.
UR - https://www.scopus.com/pages/publications/0029542305
UR - https://www.scopus.com/pages/publications/0029542305#tab=citedBy
M3 - Conference contribution
AN - SCOPUS:0029542305
SN - 0819419060
SN - 9780819419064
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 2
EP - 11
BT - Proceedings of SPIE - The International Society for Optical Engineering
T2 - Laser Techniques for Surface Science II
Y2 - 12 July 1995 through 14 July 1995
ER -