Photochromism of Neutral Spiropyran in the Crystalline State at Room Temperature

2021 ◽  
Author(s):  
Zhen Wu ◽  
Qian Wang ◽  
Pengyu Li ◽  
Bing Fang ◽  
Meizhen Yin
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Crystalline State ◽  
Room Temperature ◽  
Functional Materials ◽  
Photochromic Material ◽  
Tunable Optical Properties ◽  
Photochromic Materials

Solid-state photochromic materials are very attractive due to their promising future in advanced functional materials with reversible and tunable optical properties. However, the development of photochromic material in the solid...

scholarly journals Voltage-gated optics and plasmonics enabled by solid-state proton pumping

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Mantao Huang ◽  
Aik Jun Tan ◽  
Felix Büttner ◽  
Hailong Liu ◽  
Qifeng Ruan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Gate Dielectric ◽  
Proton Pumping ◽  
Device Scaling ◽  
Reflective Displays ◽  
Dynamic Holography ◽  
Gate Structure ◽  
Potential Applications ◽  
Tunable Optical Properties

Abstract Devices with locally-addressable and dynamically tunable optical properties underpin emerging technologies such as high-resolution reflective displays and dynamic holography. The optical properties of metals such as Y and Mg can be reversibly switched by hydrogen loading, and hydrogen-switched mirrors and plasmonic devices have been realized, but challenges remain to achieve electrical, localized and reversible control. Here we report a nanoscale solid-state proton switch that allows for electrical control of optical properties through electrochemical hydrogen gating. We demonstrate the generality and versatility of this approach by realizing tunability of a range of device characteristics including transmittance, interference color, and plasmonic resonance. We further discover and exploit a giant modulation of the effective refractive index of the gate dielectric. The simple gate structure permits device thickness down to ~20 nanometers, which can enable device scaling into the deep subwavelength regime, and has potential applications in addressable plasmonic devices and reconfigurable metamaterials.

ROOM-TEMPERATURE SOLID-STATE REACTION TO TREE-LIKE FRACTAL NANO-CdS AND THIRD-ORDER NONLINEAR OPTICAL PROPERTIES

NANO ◽  
2013 ◽  
Vol 08 (04) ◽  
pp. 1350035
Author(s):  
TAO-YU ZHOU ◽  
HUI WANG ◽  
XIAO-PING KANG ◽  
XIN-QUAN XIN
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Cadmium Sulfide ◽  
Solid State Reaction ◽  
Nonlinear Optical ◽  
Room Temperature ◽  
Average Diameter ◽  
Nonlinear Optical Properties ◽  
Third Order ◽  
Focusing Effect

A novel tree-like nano-cadmium sulfide (CdS) with the fractal feature is synthesized by solid-state reaction at room temperature from complex precursor with aminotrimethylenephosphonic acid (ATMP) as ligand. The obtained sample is the crystalline cubic beta cadmium sulfide. The tree is composed of nanorods with an average diameter of ca. 95 nm and a length of up to 100–650 nm. The nanorods grow in the asymmetrical "Y" shape. The amount of ATMP plays an important role in the formation of fractal structure. Nonlinear optical (NLO) measurements by the Z-scan technique exhibit that the tree-like fractal nano- CdS has the third-order nonlinear optical properties of both NLO absorption and NLO refraction with self-focusing effect and the optical limiting performance.

scholarly journals Bi6Te2-xRxO13 (R=Ti, Si, Ce) Systems: A Investigation for Fuel Cell Applications

2021 ◽  
Vol 19 ◽  
pp. 246-250
Author(s):  
K.D. Ferreira ◽  
◽  
G. Gasparatto ◽  
G.P. Viajante ◽  
J.F. Carvalho ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid State ◽  
Room Temperature ◽  
Materials Science ◽  
Renewable Energy Sources ◽  
Functional Materials ◽  
Cubic Phase ◽  
Ionic Conductors ◽  
Materials Synthesis ◽  
Promising Alternative

In recent years, the increase of economic and environmental problems related to energy generation has increased researches at renewable energy sources. Among others, the fuel cells excel as promising alternative technology of electricity generation and materials science is an ally in the search for better and more efficient materials for this application. In particular, solid-state ionic conductors represent functional materials with promising advantages for fuel cells, as is the case of Bi2O3-based oxygen ion conductors, however, they need to have its cubic phase stabilized at room temperature. This paper presents a study of the Bi6Te2-xRxO13 (R = Ti, Si and Ce) systems for such an application. Solid state reaction was used to materials synthesis. The 3Bi2O3:2TeO2 system present two phases, an orthorhombic one (Bi6Te2O15) stable at room temperature and another high temperature cubic (Bi6Te2O13). Experiments of substitution of Te ions by Ti, Si and Ce ions using the Bi6Te2- xRxO13 matrix were done intending to stabilize the cubic phase at room temperature and the results are presented as well as discussed here.

Tunable photoluminescence and room temperature ferromagnetism of In2S3:Dy3+,Tb3+ nanoparticles

2017 ◽  
Vol 19 (25) ◽  
pp. 16758-16764 ◽  
Author(s):  
Zhifang Li ◽  
Tianye Yang ◽  
Qi Zhao ◽  
Mingzhe Zhang
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Tunable Optical Properties

In2S3:6%Dy3+,yTb3+ nanoparticles exhibit tunable optical properties and room temperature ferromagnetism, which have been further investigated using VASP calculations.

scholarly journals Synthesis of an Adduct-Type Organic Ionic Crystal with Solid-State Ionic Conductivity from A Thiocyanate-Based Ionic Liquid and B(C6F5)3

Crystals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 567 ◽  
Author(s):  
Oki ◽  
Moriya
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
Ionic Conductivity ◽  
Ionic Crystal ◽  
Crystalline State ◽  
Room Temperature ◽  
Sodium Thiocyanate ◽  
The Novel ◽  
X Ray ◽  
State Ionic

We synthesized the novel adduct-type organic ionic crystal [C3mim][SCN·B(C6F5)3] (1) by the reaction of 1–methyl–3–propylimidazolium thiocyanate ([C3mim][SCN]), which is a room temperature ionic liquid, and B(C6F5)3, a bulky Lewis acid. The formation of a coordinative B–N bond between the SCN anion and the B(C6F5)3 in 1 was revealed by single-crystal X-ray diffractometry. We showed that 1 displays ionic conductivity in the crystalline state and that doping 1 with sodium thiocyanate and B(C6F5)3 results in a dramatic increase in ionic conductivity compared to that of 1.

scholarly journals Dielectric, ferroelectric and optical properties of Na and Nb co-doped (Bi0.5Na0.5)0.94Ba0.06TiO3

2021 ◽  
Vol 22 (4) ◽  
pp. 607-613
Author(s):  
Asif Ali ◽  
Hina Zahid
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Energy Density ◽  
Room Temperature ◽  
Optical Band Gap ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solid State Sintering ◽  
Cubic Structure ◽  
Co Doped

[(Bi0.5Na0.5)0.94Ba0.06]1-xNaTi1-xNbO3 (x = 0.5 and 0.10) ceramics were prepared via conventional solid-state sintering route. X-ray diffraction analysis of the samples exhibited the formation of the cubic structure. Similar structure was observed from the Raman spectra of the samples. The optical band gap of the samples slightly decreased from 3.08 to 3.06 eV with increasing level of Na+ and Nb5+. The addition of Na+ and Nb5+ shifted Tm towards room temperature (RT). The sample x = 0.05 had a stable relative permittivity ɛr(mid) = 3914 across the temperature range 79-350 ℃ and tanδ < 0.025 (104-279 ℃). The energy density of sample with x = 0.05 was 0.4 J/cm3 which decreased to 0.32 J/cm3 at an applied electric field of 50 kV/cm with further substitution of Na+ and Nb5+ (i.e., x = 0.10).

Ionothermal synthesis of novel Pb–OH–Cu–X (X = Cl, Br and I) quaternary heterometallic frameworks with tunable optical properties

2017 ◽  
Vol 46 (16) ◽  
pp. 5183-5188 ◽  
Author(s):  
Ying-Ying Xue ◽  
Li-Xia Zhang ◽  
Shu-Ni Li ◽  
Yu-Cheng Jiang ◽  
Man-Cheng Hu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Luminescence Properties ◽  
Ionothermal Synthesis ◽  
Tunable Optical Properties

Ionothermal synthesis of novel Pb–OH–Cu–X quaternary heterometallic frameworks exhibiting tunable structures as well as solid-state semiconducting and luminescence properties.

Sign in / Sign up

Export Citation Format

Share Document