Abstract
We have explored in situ synthesis of noble metal nanoparticles in ultrathin TiO2-gel films, in view of the increasing importance of such nanoparticle-containing thin films. The two-step procedure consists of ion exchange in the ultrathin matrix and subsequent reduction of metal ions to nanoparticles by low-temperature H2 plasma, by aqueous NaBH4, and by UV irradiation. Smooth and transparent ultrathin TiO2 films containing noble metal (Ag, Au, Pd, Pt) particles of 2-10 nm were readily obtained by this approach. The size and distribution of metal nanoparticles could be controlled by changing reaction conditions. The film thickness was precisely controlled by the cycle of film assembly. The low-temperature H2 plasma treatment, first used for preparation of noble metal nanoparticles, showed interesting advantages over chemical and photoinduced reductions in fabrication of nanoparticle-containing inorganic thin films.
| Original language | English |
|---|---|
| Pages (from-to) | 10005-10010 |
| Number of pages | 6 |
| Journal | Langmuir |
| Volume | 18 |
| Issue number | 25 |
| DOIs | |
| Publication status | Published - Dec 10 2002 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Spectroscopy
- Electrochemistry
Cite this
In situ synthesis of noble metal nanoparticles in ultrathin TiO2-gel films by a combination of ion-exchange and reduction processes. / He, Junhui; Ichinose, Izumi; Kunitake, Toyoki; Nakao, Aiko.
In: Langmuir, Vol. 18, No. 25, 10.12.2002, p. 10005-10010.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - In situ synthesis of noble metal nanoparticles in ultrathin TiO2-gel films by a combination of ion-exchange and reduction processes
AU - He, Junhui
AU - Ichinose, Izumi
AU - Kunitake, Toyoki
AU - Nakao, Aiko
PY - 2002/12/10
Y1 - 2002/12/10
N2 - We have explored in situ synthesis of noble metal nanoparticles in ultrathin TiO2-gel films, in view of the increasing importance of such nanoparticle-containing thin films. The two-step procedure consists of ion exchange in the ultrathin matrix and subsequent reduction of metal ions to nanoparticles by low-temperature H2 plasma, by aqueous NaBH4, and by UV irradiation. Smooth and transparent ultrathin TiO2 films containing noble metal (Ag, Au, Pd, Pt) particles of 2-10 nm were readily obtained by this approach. The size and distribution of metal nanoparticles could be controlled by changing reaction conditions. The film thickness was precisely controlled by the cycle of film assembly. The low-temperature H2 plasma treatment, first used for preparation of noble metal nanoparticles, showed interesting advantages over chemical and photoinduced reductions in fabrication of nanoparticle-containing inorganic thin films.
AB - We have explored in situ synthesis of noble metal nanoparticles in ultrathin TiO2-gel films, in view of the increasing importance of such nanoparticle-containing thin films. The two-step procedure consists of ion exchange in the ultrathin matrix and subsequent reduction of metal ions to nanoparticles by low-temperature H2 plasma, by aqueous NaBH4, and by UV irradiation. Smooth and transparent ultrathin TiO2 films containing noble metal (Ag, Au, Pd, Pt) particles of 2-10 nm were readily obtained by this approach. The size and distribution of metal nanoparticles could be controlled by changing reaction conditions. The film thickness was precisely controlled by the cycle of film assembly. The low-temperature H2 plasma treatment, first used for preparation of noble metal nanoparticles, showed interesting advantages over chemical and photoinduced reductions in fabrication of nanoparticle-containing inorganic thin films.
UR - http://www.scopus.com/inward/record.url?scp=0037059156&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037059156&partnerID=8YFLogxK
U2 - 10.1021/la0260584
DO - 10.1021/la0260584
M3 - Article
AN - SCOPUS:0037059156
VL - 18
SP - 10005
EP - 10010
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 25
ER -