The Role of Substrate on Thermal Evolution of Ag/TiO2 Nanogranular Thin Films

被引:9
作者
Balzano, Vincenzo [1 ]
Cavaliere, Emanuele [1 ]
Fanetti, Mattia [2 ]
Gardonio, Sandra [2 ]
Gavioli, Luca [1 ]
机构
[1] Univ Cattolica Sacro Cuore, Dipartimento Matemat & Fis, Interdisciplinary Labs Adv Mat Phys I LAMP, Via Musei 41, I-25121 Brescia, Italy
[2] Univ Nova Gorica, Mat Res Lab, Vipavska 11c, Ajdovscina 5270, Slovenia
关键词
nanogranular composite thin film; substrate driven properties; morphology; optical absorption; Ag; TiO2; ENHANCED RAMAN-SCATTERING; ANNEALING TEMPERATURE; TIO2; FILMS; OPTICAL-PROPERTIES; PHOTOCATALYTIC PROPERTIES; NANOCRYSTALLINE TIO2; SENSING PROPERTIES; SILVER DIFFUSION; GRAIN-GROWTH; NANOCOMPOSITE;
D O I
10.3390/nano11092253
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In multicomponent thin films, properties and functionalities related to post-deposition annealing treatments, such as thermal stability, optical absorption and surface morphology are typically rationalized, neglecting the role of the substrate. Here, we show the role of the substrate in determining the temperature dependent behaviour of a paradigmatic two-component nanogranular thin film (Ag/TiO2) deposited by gas phase supersonic cluster beam deposition (SCBD) on silica and sapphire. Up to 600 degrees C, no TiO2 grain growth nor crystallization is observed, likely inhibited by the Zener pinning pressure exerted by the Ag nanoparticles on the TiO2 grain boundaries. Above 600 degrees C, grain coalescence, formation of However, the two substrates steer the evolution of the film morphology and optical properties in two different directions. anatase and rutile phases and drastic modification of the optical absorption are observed. On silica, Ag is still present as NPs distributed into the TiO2 matrix, while on sapphire, hundreds of nm wide Ag aggregates appear on the film surface. Moreover, the silica-deposited film shows a broad absorption band in the visible range while the sapphire-deposited film becomes almost transparent for wavelengths above 380 nm. We discuss this result in terms of substrate differences in thermal conductivity, thermal expansion coefficient and Ag diffusivity. The study of the substrate role during annealing is possible since SCBD allows the synthesis of the same film independently of the substrate, and suggests new perspectives on the thermodynamics and physical exchanges between thin films and their substrates during heat treatments.
引用
收藏
页数:14
相关论文
共 50 条
[31]   Realization of highly transparent and low resistance TiO2/Ag/TiO2 conducting electrode for optoelectronic devices [J].
Kim, Jun Ho ;
Kim, Dae-Hyun ;
Seong, Tae-Yeon .
CERAMICS INTERNATIONAL, 2015, 41 (02) :3064-3068
[32]   DLP fabrication of TiO2 nanoparticle thin films [J].
Gonzalez-Ocegueda, P. A. ;
Herrera-Saucedo, A. ;
Quinones-Galvan, J. G. ;
Valero-Luna, C. ;
Alvarado-Perea, L. ;
Canizales-Davalos, L. ;
Martinez-Guajardo, G. ;
Banuelos-Frias, A. .
MATERIALS LETTERS, 2021, 296
[33]   Soluble powders as precursors for TiO2 thin films [J].
Löbmann, P .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2005, 33 (03) :275-282
[34]   Optical and photoelectrochemical studies on Ag2O/TiO2 double-layer thin films [J].
Li, Chuan ;
Hsieh, J. H. ;
Cheng, J. C. ;
Huang, C. C. .
THIN SOLID FILMS, 2014, 570 :436-444
[35]   Nanostructured thin films of TiO2 tailored by anodization [J].
Luna-Cervantes, Marcos ;
Valdespino-Padilla, Duilio ;
Beltrones, Jesus M. Siqueiros ;
Peredo, Luis Zamora ;
Torres, Julian Hernandez ;
Cruz-Jauregui, Ma de la Paz .
MATERIALS RESEARCH EXPRESS, 2024, 11 (02)
[36]   Synthesis of Ag ion-implanted TiO2 thin films for antibacterial application and photocatalytic performance [J].
Hou, Xinggang ;
Ma, Huiyan ;
Liu, Feng ;
Deng, Jianhua ;
Ai, Yukai ;
Zhao, Xinlei ;
Mao, Dong ;
Li, Dejun ;
Liao, Bin .
JOURNAL OF HAZARDOUS MATERIALS, 2015, 299 :59-66
[37]   Comparative study of Ag, Sn or Zn doped TiO2 thin films for photocatalytic degradation of methylene blue and methyl orange [J].
Tariq, Muhammad Kamran ;
Riaz, Adeel ;
Khan, Ramsha ;
Wajid, Ahsan ;
Hamza-ul Haq ;
Javed, Sofia ;
Akram, Muhammad Aftab ;
Islam, Mohammad .
MATERIALS RESEARCH EXPRESS, 2019, 6 (10)
[38]   Thermoluminescence properties of TiO2/Cu/TiO2 multilayer thin films fabricated by (RF/DC) sputtering for radiation dosimetry [J].
Idriss, Ali Saleh Alkadem ;
Ab Razak, Nik Noor Ashikin Nik ;
Ahmed, Naser M. ;
Abdulla, Youssef Aboubaker .
JOURNAL OF LUMINESCENCE, 2023, 260
[39]   Evolution of the surface plasmon resonance of Au:TiO2 nanocomposite thin films with annealing temperature [J].
Borges, J. ;
Buljan, M. ;
Sancho-Parramon, J. ;
Bogdanovic-Radovic, I. ;
Siketic, Z. ;
Scherer, T. ;
Kuebel, C. ;
Bernstorff, S. ;
Cavaleiro, A. ;
Vaz, F. ;
Rolo, A. G. .
JOURNAL OF NANOPARTICLE RESEARCH, 2014, 16 (12)
[40]   (111)-oriented BaTiO3 thin films hydrothermally formed on TiO2/Si substrate [J].
Xu, WP ;
Zheng, LR ;
Lin, CL ;
Okuyama, M .
INTEGRATED FERROELECTRICS, 1996, 12 (2-4) :233-239