Annealing Effect on Reversible Photochromic Properties of Ag@TiO2 Nanocomposite Film

2013 ◽  
Vol 537 ◽  
pp. 201-204 ◽  
Author(s):  
Juan Zuo
Keyword(s):  
Large Scale ◽  
Optical Memory ◽  
Rf Magnetron Sputtering ◽  
Film Structure ◽  
Annealing Effect ◽  
Nanocomposite Films ◽  
Photochromic Properties ◽  
Visible Absorption ◽  
Smart Windows ◽  
Ag Film

Large-scale uniform Ag@TiO2 films was prepared by RF magnetron sputtering in pure Ar plasma using polycrystalline TiO2 semiconductor sintered target. The effect of annealing on the photochromic properties was studied to obtain a better understanding of the interaction of the structure. Ultraviolet-visible absorption and scanning electron microscopy were performed to investigate the possibility of tailoring the structure with consequent modification of the optical properties. Ag nanoparticles were formed between TiO2 films after annealing the samples with Ag film structure. The annealed Ag@TiO2 films present a photochromic property in comparison with the as-prepared samples. Such nanocomposite films can be used as smart windows, high density multiwavelength optical memory and rewritable electronic paper.

Yttrium Oxyhydrides for Photochromic Applications: Correlating Composition and Optical Response

2018 ◽  
Author(s):  
Dmitrii Moldarev ◽  
Elbruz M. Baba ◽  
Marcos V. Moro ◽  
Chang C. You ◽  
Smagul Zh. Karazhanov ◽  
...  
Keyword(s):  
Medical Devices ◽  
Ternary Diagram ◽  
Optical And Electrical Properties ◽  
Ambient Conditions ◽  
Elastic Recoil ◽  
Elastic Recoil Detection Analysis ◽  
Photochromic Properties ◽  
Smart Windows ◽  
Elastic Recoil Detection ◽  
Detection Analysis

It has been recently demonstrated that yttrium oxyhydride(YHO) films can exhibit reversible photochromic properties when exposed to illumination at ambient conditions. This switchable optical propertyenables their utilization in many technological applications, such as smart windows, sensors, goggles, medical devices, etc. However, how the composition of the films affects their optical properties is not fully clear and therefore demands a straightforward investigation. In this work, the composition of YHO films manufactured by reactive magnetron sputtering under different conditions is deduced in a ternary diagram from Time-of-Flight Elastic Recoil Detection Analysis (ToF-ERDA). The results suggest that stable compounds are formed with a specificchemical formula – YH<sub>2-δ</sub>O<sub>δ</sub>. In addition, optical and electrical properties of the films are investigated, and a correlation with their compositions is established. The corresponding photochromic response is found in a specific oxygen concentration range (0.45 < δ < 1.5) with maximum and minimum of magnitude on the lower and higher border, respectively.

scholarly journals Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films

2020 ◽  
Vol 9 (1) ◽  
pp. 751-759 ◽  
Author(s):  
Xinxin Lian ◽  
Yuanjiang Lv ◽  
Haoliang Sun ◽  
David Hui ◽  
Guangxin Wang
Keyword(s):  
Ag Nanoparticles ◽  
Large Scale ◽  
Low Cost ◽  
Film Surface ◽  
Time Domain Analysis ◽  
Alloy Film ◽  
Scale Production ◽  
Alloy Films ◽  
Surface Enhanced Raman ◽  
Ag Film

AbstractAg nanoparticles/Mo–Ag alloy films with different Ag contents were prepared on polyimide by magnetron sputtering. The effects of Ag contents on the microstructure of self-grown Ag nanoparticles/Mo–Ag alloy films were investigated using XRD, FESEM, EDS and TEM. The Ag content plays an important role in the size and number of uniformly distributed Ag nanoparticles spontaneously formed on the Mo–Ag alloy film surface, and the morphology of the self-grown Ag nanoparticles has changed significantly. Additionally, it is worth noting that the Ag nanoparticles/Mo–Ag alloy films covered by a thin Ag film exhibits highly sensitive surface-enhanced Raman scattering (SERS) performance. The electric field distributions were calculated using finite-difference time-domain analysis to further prove that the SERS enhancement of the films is mainly determined by “hot spots” in the interparticle gap between Ag nanoparticles. The detection limit of the Ag film/Ag nanoparticles/Mo–Ag alloy film for Rhodamine 6G probe molecules was 5 × 10−14 mol/L. Therefore, the novel type of the Ag film/Ag nanoparticles/Mo–Ag alloy film can be used as an ideal SERS-active substrate for low-cost and large-scale production.

Synthesis, Properties and Application in Optical Memory of a New Photochromic Diarylethene Based on a Chlorine Atom

2012 ◽  
Vol 455-456 ◽  
pp. 25-28 ◽  
Author(s):  
Zhi Peng Tong ◽  
Gang Liu ◽  
Shi Qiang Cui
Keyword(s):  
Chlorine Atom ◽  
Uv Light ◽  
Optical Memory ◽  
Optical Recording ◽  
Pmma Film ◽  
Recording Medium ◽  
Photochromic Properties ◽  
Synthesis Properties

A new unsymmetrical photochromic diarylethene 1-(2,4-dimethyl-3-isoxazol)-2-[2-methyl-5-(2-chlorophenyl) -3-thienyl] perfluorocyclopentene (1a) has been synthesized. Its photochromic properties in solution and PMMA film were investigated. Diarylethene 1a changed the color from colorless to red upon irradiation with 297 nm UV light, in which absorption maxima were observed at 515 nm in hexane and at 526 nm in PMMA film, The results demonstrated that it can be potentially used as polarization holographic optical recording medium.

scholarly journals Near-field Optical Memory Head using Corrugated Thin Metallic Film Structure

2005 ◽  
Vol 33 (Supplement) ◽  
pp. S26-S27
Author(s):  
Kenya Goto ◽  
Yoshiki Masuda ◽  
Satoshi Mitsugi ◽  
Takahito Ono ◽  
Takahiro Kono
Keyword(s):  
Near Field ◽  
Optical Memory ◽  
Film Structure ◽  
Metallic Film ◽  
Thin Metallic Film

AQUEOUS SYNTHESIS OF HIGH QUANTUM YIELD AND MONODISPERSED THIOL-CAPPED CdxZn1-xTe QUANTUM DOTS BASED ON ELECTROCHEMICAL METHOD

NANO ◽  
2012 ◽  
Vol 07 (02) ◽  
pp. 1250011 ◽  
Author(s):  
JUNWEI LI ◽  
YANG JIANG ◽  
YUGANG ZHANG ◽  
DI WU ◽  
ANQI LUO ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Quantum Dots ◽  
Quantum Yield ◽  
Electrochemical Method ◽  
Large Scale ◽  
Ostwald Ripening ◽  
Visible Absorption ◽  
Aqueous Synthesis ◽  
Transmission Electron

A facile green approach has been developed to control the growth regime in the aqueous synthesis of CdxZn1-xTe semiconductor quantum dots (QDs) based on the electrochemistry method. The Low growth temperature and slow injection of Te precursor are used to prolong the diffusion controlled stage and thus suppress Ostwald ripening during the nanocrystal growth. The experimental results showed that a low concentration of Te precursor will definitely influence the growth procedure. The UV–visible absorption spectra, as well as transmission electron microscopy (TEM) shows the QDs a good monodispersity at any interval of the reaction procedure. The high-resolution transmission electron microscopy (HRTEM) images and powder X-ray diffraction (XRD) pattern suggested that the as-prepared QDs have high crystallinity and cubic structure. The size and composition-dependent fluorescent emission wavelength of the resultant CdxZn1-xTe alloyed QDs can be tuned from 460 to 610 nm, and their photoluminescent quantum yield can reach up to 70%. Especially in the wavelength range of 510–578 nm, the overall PL QYs of the as-prepared CdxZn1-xTe QDs were above 50%. The current work suggests that electrochemical method is an attractive approach to the synthesis of high-quality II-VI ternary alloyed semiconductor QDs at large-scale with a prominent cost advantage.

scholarly journals Annealing effect of linear and nonlinear optical properties of Ag:Bi2O3 nanocomposite films

2005 ◽  
Vol 13 (5) ◽  
pp. 1508 ◽  
Author(s):  
Peng Zhou ◽  
Guanjun You ◽  
Jing Li ◽  
Songyou Wang ◽  
Shixiong Qian ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Annealing Effect ◽  
Nonlinear Optical Properties ◽  
Nanocomposite Films ◽  
Linear And Nonlinear

scholarly journals The regulatory effects of the number of VP(N-vinylpyrrolidone) function groups on macrostructure and photochromic properties of polyoxometalates/copolymer hybrid films

e-Polymers ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 1-7
Author(s):  
Zong-lai Liu ◽  
Tong-tong Yue ◽  
Wen-tian Sun ◽  
Feng-jun Zhang ◽  
Wei Feng
Keyword(s):  
Methyl Acrylate ◽  
Reduction Process ◽  
Covalent Bond ◽  
Esr Spectra ◽  
Nanocomposite Films ◽  
Hybrid Films ◽  
Photochromic Properties ◽  
Ft Ir ◽  
Regulatory Effects ◽  
Thermal Stability Of

AbstractNanocomposite films were synthesized by introducing phosphotungstic acid (PWA) into the poly (vinylpyrrolidone and methyl acrylate) (P (VP(N-vinylpyrrolidone)coMA(methyl acrylate))). FT-IR curves illustrated that non-covalent bond interaction was built between PWA particles and organic matrixes. In combination the results of SEM, TG-DTA and DSC, it was conducted that the ratio of functional groups of VP had a critical effect on the surface morphology, thermal stability of the hybrid films. Irradiated with ultraviolet light, the transparent thin hybrid films change from colorless to blue. Stored in air, the hybrid films could recover colorless gradually. The analysis of kinetics told us that higher VP content within the different systems always accompanied more superior photochromic performance, faster coloring and fading speed. Appearance of W5+ in ESR spectra indicated that the photo-reduction process between PWA and copolymer matrix occurred.

scholarly journals Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Peng Hong ◽  
Zhu Liu ◽  
Yang Gao ◽  
Yubin Chen ◽  
Mingxun Zhuang ◽  
...  
Keyword(s):  
Large Scale ◽  
Separation Efficiency ◽  
Low Cost ◽  
Water Repellency ◽  
Dip Coating ◽  
Absorption Capacity ◽  
Photochromic Properties ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

Superhydrophobic sponge as potential absorbing material for oil/water separation is attracting great attention recently. However, there are still some challenges to feasibly fabricate superhydrophobic sponge with large scale and low cost. Herein, a novel photochromic superhydrophobic melamine sponge (PDMS-SP sponge) is fabricated by facilely dip-coating and thermocuring of hydroxyl-terminated polydimethylsiloxanes mixed with photochromic spiropyran. FT-IR, EDS, and XPS results confirm the successful coating of PDMS-SP upon melamine sponge. The resultant sponge not only possesses excellent water repellency with a contact angle of 154.5° and oil-water separation efficiency with an oil absorption capacity of 48–116 folds of itself weight, but also shows photochromic phenomenon between colorless and purple when it is successively exposed to UV irradiation and visible light.

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