PMID- 26276604
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150819
LR  - 20150815
IS  - 1948-7185 (Electronic)
IS  - 1948-7185 (Linking)
VI  - 5
IP  - 3
DP  - 2014 Feb 6
TI  - Vibrational Dynamics of Interfacial Water by Free Induction Decay Sum Frequency 
      Generation (FID-SFG) at the Al2O3(1120)/H2O Interface.
PG  - 528-33
LID - 10.1021/jz401961j [doi]
AB  - The dephasing dynamics of a vibrational coherence may reveal the interactions of 
      chemical functional groups with their environment. To investigate this process at 
      a surface, we employ free induction decay sum frequency generation (FID-SFG) to 
      measure the time that it takes for free OH stretch oscillators at the charged (pH 
       approximately  13, KOH) interface of alumina/water (Al2O3/H2O) to lose their collective 
      coherence. By employing noncollinear optical parametric amplification (NOPA) 
      technology and nonlinear vibrational spectroscopy, we showed that the single free 
      OH peak actually corresponds to two distinct oscillators oriented opposite to 
      each other and measured the total dephasing time, T2, of the free OH stretch 
      modes at the Al2O3/H2O interface with a sub-40 fs temporal resolution. Our 
      results suggested that the free OH oscillators associated with interfacial water 
      dephase on the time scale of 89.4 +/- 6.9 fs, whereas the homogeneous dephasing of 
      interfacial alumina hydroxyls is an order of magnitude slower.
FAU - Boulesbaa, Abdelaziz
AU  - Boulesbaa A
AD  - Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, 
      Pennsylvania 19122, United States.
FAU - Borguet, Eric
AU  - Borguet E
AD  - Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, 
      Pennsylvania 19122, United States.
LA  - eng
PT  - Journal Article
DEP - 20140124
PL  - United States
TA  - J Phys Chem Lett
JT  - The journal of physical chemistry letters
JID - 101526034
OTO - NOTNLM
OT  - NOPA
OT  - alumina surface
OT  - interfacial dynamics
OT  - nonlinear spectroscopy
OT  - vibrational dynamics
EDAT- 2014/02/06 00:00
MHDA- 2014/02/06 00:01
CRDT- 2015/08/16 06:00
PHST- 2015/08/16 06:00 [entrez]
PHST- 2014/02/06 00:00 [pubmed]
PHST- 2014/02/06 00:01 [medline]
AID - 10.1021/jz401961j [doi]
PST - ppublish
SO  - J Phys Chem Lett. 2014 Feb 6;5(3):528-33. doi: 10.1021/jz401961j. Epub 2014 Jan 
      24.