Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 130-137 |
| Seitenumfang | 8 |
| Fachzeitschrift | Materials research bulletin |
| Jahrgang | 114 |
| Frühes Online-Datum | 22 Feb. 2019 |
| Publikationsstatus | Veröffentlicht - Juni 2019 |
| Extern publiziert | Ja |
Abstract
We report on a comparative study of photonic sensitivities of organic-inorganic hybrids prepared with size-selected 5 nm titanium-oxo-alkoxo nanoparticles and two different organic phases: HEMA (2-hydroxyethyl methacrylate) and MAPTMS (3-methacryloxypropyltrimethoxysilane). After organic polymerization, the obtained pHEMA-TiO 2 and pMAPTMS-TiO 2 hybrids are solids with different inter-component bindings. While surface exchange fixes organic (HEMA than pHEMA) groups on the nanoparticle surface, the titanium-oxo-alkoxo nanoparticles do not interact with the organic component in the pMAPTMS-TiO 2 hydrid. Indeed, MAPTMS molecules are hydrolyzed forming condensed Si–O–Si species. The formation of Si–O–Ti bonds is observed at the organic thermal polymerization stage, which may be a signature of the silica layer formation at the particles surface. Consequently, the quantum efficiency of the photoinduced charge separation and storage in pMAPTMS-TiO 2 hybrids is found considerably lower compared to that in pHEMA-TiO 2 hybrids. The 3D micro-structuring of the hybrid solutions has been realized using 2-photon laser polymerization. The structures were mechanically more stable and easier to achieve in pMAPTMS-TiO 2 compared to pHEMA-TiO 2 . Moreover, higher density of the photoinduced electrons decreases the damage threshold in the pHEMA-TiO 2 hybrids.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Ingenieurwesen (insg.)
- Werkstoffmechanik
- Ingenieurwesen (insg.)
- Maschinenbau
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in: Materials research bulletin, Jahrgang 114, 06.2019, S. 130-137.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Alkoxysilane effect in hybrid material
T2 - A comparison of pHEMA-TiO 2 and pMAPTMS-TiO 2 nanoparticulate hybrids
AU - Gorbovyi, P.
AU - Diaz-Gomez, A. P.
AU - Traore, M.
AU - Museur, L.
AU - Rozes, L.
AU - Ribot, F.
AU - Sanchez, C.
AU - Kuznetsov, A. I.
AU - Chichkov, B. N.
AU - Kanaev, A.
N1 - Funding Information: This work has been supported by I-20110047 EC project within EU contract ELISA-226716. The authors acknowledge the financial support of C'Nano IdF and IFR Paris-Nord Plaine of France. This scientific work has also been supported by the Grant RSF No. 16-13-10528 (for investigations of nanoparticle – organic interactions).
PY - 2019/6
Y1 - 2019/6
N2 - We report on a comparative study of photonic sensitivities of organic-inorganic hybrids prepared with size-selected 5 nm titanium-oxo-alkoxo nanoparticles and two different organic phases: HEMA (2-hydroxyethyl methacrylate) and MAPTMS (3-methacryloxypropyltrimethoxysilane). After organic polymerization, the obtained pHEMA-TiO 2 and pMAPTMS-TiO 2 hybrids are solids with different inter-component bindings. While surface exchange fixes organic (HEMA than pHEMA) groups on the nanoparticle surface, the titanium-oxo-alkoxo nanoparticles do not interact with the organic component in the pMAPTMS-TiO 2 hydrid. Indeed, MAPTMS molecules are hydrolyzed forming condensed Si–O–Si species. The formation of Si–O–Ti bonds is observed at the organic thermal polymerization stage, which may be a signature of the silica layer formation at the particles surface. Consequently, the quantum efficiency of the photoinduced charge separation and storage in pMAPTMS-TiO 2 hybrids is found considerably lower compared to that in pHEMA-TiO 2 hybrids. The 3D micro-structuring of the hybrid solutions has been realized using 2-photon laser polymerization. The structures were mechanically more stable and easier to achieve in pMAPTMS-TiO 2 compared to pHEMA-TiO 2 . Moreover, higher density of the photoinduced electrons decreases the damage threshold in the pHEMA-TiO 2 hybrids.
AB - We report on a comparative study of photonic sensitivities of organic-inorganic hybrids prepared with size-selected 5 nm titanium-oxo-alkoxo nanoparticles and two different organic phases: HEMA (2-hydroxyethyl methacrylate) and MAPTMS (3-methacryloxypropyltrimethoxysilane). After organic polymerization, the obtained pHEMA-TiO 2 and pMAPTMS-TiO 2 hybrids are solids with different inter-component bindings. While surface exchange fixes organic (HEMA than pHEMA) groups on the nanoparticle surface, the titanium-oxo-alkoxo nanoparticles do not interact with the organic component in the pMAPTMS-TiO 2 hydrid. Indeed, MAPTMS molecules are hydrolyzed forming condensed Si–O–Si species. The formation of Si–O–Ti bonds is observed at the organic thermal polymerization stage, which may be a signature of the silica layer formation at the particles surface. Consequently, the quantum efficiency of the photoinduced charge separation and storage in pMAPTMS-TiO 2 hybrids is found considerably lower compared to that in pHEMA-TiO 2 hybrids. The 3D micro-structuring of the hybrid solutions has been realized using 2-photon laser polymerization. The structures were mechanically more stable and easier to achieve in pMAPTMS-TiO 2 compared to pHEMA-TiO 2 . Moreover, higher density of the photoinduced electrons decreases the damage threshold in the pHEMA-TiO 2 hybrids.
KW - A. Hybrids
KW - A. Nanostructures
KW - B. Optical properties
KW - B. Sol-gel chemistry
UR - http://www.scopus.com/inward/record.url?scp=85062417431&partnerID=8YFLogxK
U2 - 10.1016/j.materresbull.2019.02.013
DO - 10.1016/j.materresbull.2019.02.013
M3 - Article
AN - SCOPUS:85062417431
VL - 114
SP - 130
EP - 137
JO - Materials research bulletin
JF - Materials research bulletin
SN - 0025-5408
ER -