10.1021/acsami.6b13070.s001
Ming-Hua Yeh
Ming-Hua
Yeh
Po-Hsun Chen
Po-Hsun
Chen
Yi-Ching Yang
Yi-Ching
Yang
Guan-Hong Chen
Guan-Hong
Chen
Hsueh-Shih Chen
Hsueh-Shih
Chen
Investigation of Ag-TiO<sub>2</sub> Interfacial Reaction
of Highly Stable Ag Nanowire Transparent Conductive Film with Conformal
TiO<sub>2</sub> Coating by Atomic Layer Deposition
American Chemical Society
2017
Atomic Layer Deposition
Ag NWs
ALD TiO 2 layer
layer deposition
conductive films
1 D-to -3D
Ag penetration
coat Ag nanowires
TiO 2 seeding
Ag NW TCFs
TiO 2 layer
TiO 2 shell surface
Conductive Film
surface polyvinylpyrrolidone
vapor pressure
Stable Ag Nanowire
conformal TiO 2 shell
PVP
Ag NW
form nanocrystals
Conformal TiO 2 Coating
violet-blue light filtration
conformal TiO 2 layer
ALD process
TiO 2
Ag-TiO 2 Interfacial Reaction
2017-02-22 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Investigation_of_Ag-TiO_sub_2_sub_Interfacial_Reaction_of_Highly_Stable_Ag_Nanowire_Transparent_Conductive_Film_with_Conformal_TiO_sub_2_sub_Coating_by_Atomic_Layer_Deposition/4765687
The
atomic layer deposition (ALD) technique is applied to coat Ag nanowires
(NWs) with a highly uniform and conformal TiO<sub>2</sub> layer to
improve the stability and sustainability of Ag NW transparent conductive
films (TCFs) at high temperatures. The TiO<sub>2</sub> layer can be
directly deposited on Ag NWs with a surface polyvinylpyrrolidone (PVP)
coat that acts a bed for TiO<sub>2</sub> seeding in the ALD process.
The ALD TiO<sub>2</sub> layer significantly enhances the thermal stability
at least 100 fold when aged between 200–400 °C and also
provides an extra function of violet-blue light filtration for Ag
NW TCFs. Investigation into the interaction between TiO<sub>2</sub> and Ag reveals that the conformal TiO<sub>2</sub> shell could effectively
prevent Ag from 1D-to-3D ripening. However, Ag could penetrate the
conformal TiO<sub>2</sub> shell and form nanocrystals on the TiO<sub>2</sub> shell surface when it is aged at 400 °C. According to
experimental data and thermodynamic evaluation, the Ag penetration
leads to an interlayer composed of mixed Ag–Ag<sub>2</sub>O-amorphous
carbon phases and TiO<sub>2–<i>x</i></sub> at the
Ag–TiO<sub>2</sub> interface, which is thought to be caused
by extremely high vapor pressure of Ag at the Ag–TiO<sub>2</sub> interface at a higher temperature (e.g., 400 °C).