TY - JOUR
T1 - Structure of water in the vicinity of a zwitterionic polymer brush as examined by sum frequency generation method
AU - Kondo, Takuya
AU - Nomura, Kouji
AU - Murou, Masanobu
AU - Gemmei-Ide, Makoto
AU - Kitano, Hiromi
AU - Noguchi, Hidenori
AU - Uosaki, Kohei
AU - Ohno, Kohji
AU - Saruwatari, Yoshiyuki
N1 - Funding Information:
This research was supported by a Grant-in-Aid for Scientific Research ( 22350101 ) from the Japan Society for the Promotion of Science (JSPS) and a Grant-in-Aid for Scientific Research on Innovative Areas ( 20106007 ) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan . The internship program of NIMS for T. K. to pursue SFG measurements at NIMS was strongly appreciated. We are indebted to Osaka Organic Chemical Industry Ltd., for the continuous support to pursue this work. We are grateful to Professor Y. Tsujii, Kyoto University, for allowing us to use the ellipsometer.
PY - 2012/12/1
Y1 - 2012/12/1
N2 - A zwitterionic poly(carboxymethylbetaine) (PCMB) brush was prepared on a fused quartz prism by the surface-initiated atom transfer radical polymerization (SI-ATRP) of CMB monomer. The conformation of PCMB brush and the state of water at the surface of the brush were examined using sum frequency generation (SFG) technique. The C. H stretching band of the brush, indicating the gauche defect of the brush, was affected by the contact medium such as dry nitrogen, water vapor-saturated nitrogen and liquid water. The water molecules at the PCMB-water interfaces were not largely oriented in comparison with the interfacial water of both bare and the ATRP-initiator-modified quartz prisms. The similar tendency was previously observed for water in the vicinity of water-soluble zwitterionic polymers and polymer thin films using Raman and attenuated total reflection (ATR) infrared spectroscopies, respectively. The electrical neutralization between neighboring positive and negative charges might diminish the electrostatic adsorption of water molecules to the vicinity of zwitterionic polymer brushes.
AB - A zwitterionic poly(carboxymethylbetaine) (PCMB) brush was prepared on a fused quartz prism by the surface-initiated atom transfer radical polymerization (SI-ATRP) of CMB monomer. The conformation of PCMB brush and the state of water at the surface of the brush were examined using sum frequency generation (SFG) technique. The C. H stretching band of the brush, indicating the gauche defect of the brush, was affected by the contact medium such as dry nitrogen, water vapor-saturated nitrogen and liquid water. The water molecules at the PCMB-water interfaces were not largely oriented in comparison with the interfacial water of both bare and the ATRP-initiator-modified quartz prisms. The similar tendency was previously observed for water in the vicinity of water-soluble zwitterionic polymers and polymer thin films using Raman and attenuated total reflection (ATR) infrared spectroscopies, respectively. The electrical neutralization between neighboring positive and negative charges might diminish the electrostatic adsorption of water molecules to the vicinity of zwitterionic polymer brushes.
KW - Atom-transfer radical polymerization
KW - Orientation of water molecules
KW - Sum frequency generation
KW - Zwitterionic polymer brush
UR - http://www.scopus.com/inward/record.url?scp=84863226284&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfb.2012.05.008
DO - 10.1016/j.colsurfb.2012.05.008
M3 - 学術論文
C2 - 22766288
AN - SCOPUS:84863226284
SN - 0927-7765
VL - 100
SP - 126
EP - 132
JO - Colloids and Surfaces B: Biointerfaces
JF - Colloids and Surfaces B: Biointerfaces
ER -