TY - JOUR
T1 - Effects of capping thiols on the laser-induced fusion of gold nanoparticles and deposition onto glass substrates in cyclohexane
AU - Takahashi, Hironobu
AU - Niidome, Yasuro
AU - Sato, Takuro
AU - Yamada, Sunao
N1 - Funding Information:
The authors thank Prof. H. Nakamura at Hokkaido University for the elemental analysis measurements. The present study was partially supported by Grants-in-Aid for Scientific Research on Priority Areas (417) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of the Japanese Government, for the 21st Century COE Program ‘Functional Innovation of Molecular Informatics’, and Industrial Technology Research Grant Program in ’03 from New Energy and Industrial Technology Development Organization (NEDO) of Japan.
PY - 2004/10/21
Y1 - 2004/10/21
N2 - On irradiation with pulsed 532-nm laser light, dodecanethiol (DT)-capped gold nanoparticles (DT-Au) aggregate and fuse in organic solvents. As a result of particle destabilization, the particles are deposited onto a glass substrate immersed in a colloidal cyclohexane solution. Generally, the properties of gold nanoparticles depend strongly on the surface conditions of the particles. In this report, small amounts of immobilized DT molecules were replaced with 1,6-hexanedithiol (HD) molecules, giving gold nanoparticles capped with DT and HD, denoted as (DT + HD)-Au. The amount of HD in (DT + HD)-Au was determined to be ∼6% by elemental analysis. Interestingly, the absorption spectra of DT-Au and (DT + HD)-Au indicated that both particles have similar stabilities in colloidal solution. Despite this, the activities of these gold nanoparticles after laser irradiation differed dramatically. When (DT + HD)-Au was used instead of DT-Au, the degree of growth and deposition of gold nanoparticles was accelerated and the deposited particles were huge, reaching sizes of several hundreds of nanometers.
AB - On irradiation with pulsed 532-nm laser light, dodecanethiol (DT)-capped gold nanoparticles (DT-Au) aggregate and fuse in organic solvents. As a result of particle destabilization, the particles are deposited onto a glass substrate immersed in a colloidal cyclohexane solution. Generally, the properties of gold nanoparticles depend strongly on the surface conditions of the particles. In this report, small amounts of immobilized DT molecules were replaced with 1,6-hexanedithiol (HD) molecules, giving gold nanoparticles capped with DT and HD, denoted as (DT + HD)-Au. The amount of HD in (DT + HD)-Au was determined to be ∼6% by elemental analysis. Interestingly, the absorption spectra of DT-Au and (DT + HD)-Au indicated that both particles have similar stabilities in colloidal solution. Despite this, the activities of these gold nanoparticles after laser irradiation differed dramatically. When (DT + HD)-Au was used instead of DT-Au, the degree of growth and deposition of gold nanoparticles was accelerated and the deposited particles were huge, reaching sizes of several hundreds of nanometers.
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U2 - 10.1016/j.colsurfa.2004.08.023
DO - 10.1016/j.colsurfa.2004.08.023
M3 - Article
AN - SCOPUS:5644288438
SN - 0927-7757
VL - 247
SP - 105
EP - 113
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -