PMID- 16771404
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20070807
LR  - 20060614
IS  - 1520-6106 (Print)
IS  - 1520-5207 (Linking)
VI  - 110
IP  - 23
DP  - 2006 Jun 15
TI  - Tuning molecule-surface interactions with sub-nanometer-thick covalently bound 
      organic monolayers.
PG  - 11334-43
AB  - Measurements of the thermal desorption of methyl bromide (MeBr) from bare and 
      RS-functionalized GaAs(110), where R = CH3 and CH3CH2, reveal marked systematic 
      changes in molecule-surface interactions. As the thickness of the organic spacer 
      layer is increased, the electrostatic MeBr-GaAs(110) interaction decreases, 
      lowering the activation energy for desorption, Ed, as well as decreasing the 
      critical coverage required for nucleation of bulklike MeBr. On the 
      CH3CH2S-functionalized surface, Ed is lowered to a value roughly equal to that 
      for desorption from three-dimensional (3-D) clusters; because the kinetics of 
      desorption of isolated molecules differs from that for desorption from clusters, 
      desorption of isolated molecules from the organic surface occurs at a lower 
      temperature than desorption from the clusters. Thus, the "monolayer" desorption 
      wave occurs at a lower temperature than the "multilayer" desorption wave. These 
      results illustrate the role that organic chain length in nanometer-scale thin 
      films can play in alteration of the delicate balance of interfacial interactions.
FAU - Camillone, Nicholas 3rd
AU  - Camillone N 3rd
AD  - Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, USA. 
      nicholas@bnl.gov
FAU - Pak, Theodore R
AU  - Pak TR
FAU - Adib, Kaveh
AU  - Adib K
FAU - Osgood, Richard M Jr
AU  - Osgood RM Jr
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Phys Chem B
JT  - The journal of physical chemistry. B
JID - 101157530
EDAT- 2006/06/15 09:00
MHDA- 2006/06/15 09:01
CRDT- 2006/06/15 09:00
PHST- 2006/06/15 09:00 [pubmed]
PHST- 2006/06/15 09:01 [medline]
PHST- 2006/06/15 09:00 [entrez]
AID - 10.1021/jp0606659 [doi]
PST - ppublish
SO  - J Phys Chem B. 2006 Jun 15;110(23):11334-43. doi: 10.1021/jp0606659.