PMID- 16851414
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20070531
LR  - 20060720
IS  - 1520-6106 (Print)
IS  - 1520-5207 (Linking)
VI  - 109
IP  - 9
DP  - 2005 Mar 10
TI  - Resistance changes due to thermal coalescence in colloidal au/organic linker 
      molecule multilayer films.
PG  - 3715-8
AB  - A decrease in the resistance of colloidal Au multilayer films was observed upon 
      heating. These multilayer Au films were fabricated by a layer-by-layer approach, 
      using Au colloids and a bifunctional linker molecule, 1,6 hexanedithiol (HD) on 
      polymer substrates. The resistance of the film prior to heating was 1 MOmega. The 
      films were heated at three different temperatures, 120, 160, and 180 degrees C. 
      After heating for 12 h, the resistance decreased by 6 orders of magnitude to 
      about 50 Omega. This decrease in resistance was faster at higher temperatures. 
      X-ray photoelectron spectroscopy (XPS) of the unheated films revealed two S 2p 
      peaks corresponding to the Au-S thiolate peak and an oxidized S peak. Upon 
      heating, the relative intensity of the oxidized S peak increased and that of the 
      Au-S peak decreased, indicating an oxidation and desorption of the linker 
      molecules. Scanning electron microscope (SEM) images of the heated films depict 
      coalescence of the spherical Au particles into irregular shapes. The resistance 
      decrease is believed to be due to the desorption of the linker molecule and 
      subsequent coalescence of the Au particles. This method paves a way for 
      controlling the resistance of electrodes on flexible polymer substrates.
FAU - Supriya, Lakshmi
AU  - Supriya L
FAU - Claus, Richard O
AU  - Claus RO
LA  - eng
PT  - Letter
PL  - United States
TA  - J Phys Chem B
JT  - The journal of physical chemistry. B
JID - 101157530
EDAT- 2006/07/21 09:00
MHDA- 2006/07/21 09:01
CRDT- 2006/07/21 09:00
PHST- 2006/07/21 09:00 [pubmed]
PHST- 2006/07/21 09:01 [medline]
PHST- 2006/07/21 09:00 [entrez]
AID - 10.1021/jp044321z [doi]
PST - ppublish
SO  - J Phys Chem B. 2005 Mar 10;109(9):3715-8. doi: 10.1021/jp044321z.