scholarly journals VO2 microcrystals as an advanced smart window material at semiconductor to metal transition

2017 ◽  
Vol 50 (46) ◽  
pp. 465602 ◽  
Author(s):  
Raktima Basu ◽  
P Magudapathy ◽  
Manas Sardar ◽  
Ramanathaswamy Pandian ◽  
Sandip Dhara
Keyword(s):  
Smart Window ◽  
Window Material

One-step hydrothermal synthesis and thermochromic properties of chlorine-doped VO2(M) for smart window application

2019 ◽  
Vol 13 (01) ◽  
pp. 1951008 ◽  
Author(s):  
Anung Riapanitra ◽  
Yusuke Asakura ◽  
Shu Yin
Keyword(s):  
Critical Temperature ◽  
Optimum Temperature ◽  
Smart Window ◽  
As Doping ◽  
Chlorine Anion ◽  
Thermochromic Properties ◽  
One Step ◽  
Promising Application ◽  
Window Material ◽  
Hydrothermal Reduction

The monoclinic phase of VO2 has promising application as a smart window material because it possesses a reversible metal-to-semiconductor transformation with a critical temperature of [Formula: see text]C. The high critical temperature must be lowered to achieve a possible application. Anion doping has been widely researched as possible doping of VO2(M) with fluorine is the main option nowadays. However, other halogen elements such as chlorine have not been investigated albeit possessing possible advantages properties. In this work, we report the use of chlorine anion as doping for VO2(M) to lower its critical temperature and to enhance its thermochromic performance. The synthesis was performed using a facile one-step hydrothermal reduction of vanadium pentoxide by hydrazine at 350–[Formula: see text]C, using ammonium chloride as the source of the anion. The result showed that the optimum temperature to synthesize Cl-doped VO2(M) was [Formula: see text]C. The lowest critical temperature that can be achieved by chlorine-doped VO2(M) was at [Formula: see text]C. The thermochromic performance of Cl-doped VO2(M) was improved compared to pristine VO2(M) nanoparticle. This finding provides a novel use of chlorine-doped VO2(M) with a facile one-step hydrothermal method to synthesize chlorine-doped VO2(M) as well as the feasibility of chlorine-doped VO2(M) as a smart window material.

A new strategy of nanocompositing vanadium dioxide with excellent durability

2021 ◽  
Author(s):  
Xin Zhou ◽  
Yun Meng ◽  
Tuan Duc Vu ◽  
Deen Gu ◽  
Yadong Jiang ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Vanadium Dioxide ◽  
High Transition Temperature ◽  
Solar Modulation ◽  
Smart Window ◽  
Thermochromic Property ◽  
New Strategy ◽  
High Transition ◽  
Window Material

Vanadium dioxide is widely investigated as a thermochromic smart window material. However its mediocre thermochromic property (low solar modulation ability ΔTsol, low luminous transmission Tlum, and high transition temperature (τc))....

Copper-Filled Through-Hole Electrode of a ZnS Window Material for Sealing a Thermal Infrared Sensor

2010 ◽  
Vol 130 (9) ◽  
pp. 437-442
Author(s):  
Takafumi Fukumoto ◽  
Naoki Okamoto ◽  
Yoshimi Ohta ◽  
Yasuhiro Fukuyama ◽  
Masaki Hirota ◽  
...  
Keyword(s):  
Thermal Infrared ◽  
Infrared Sensor ◽  
Window Material ◽  
Through Hole

scholarly journals Energy and daylight performance of a smart window: Window integrated with thermotropic parallel slat-transparent insulation material

2021 ◽  
Vol 293 ◽  
pp. 116826
Author(s):  
Yanyi Sun ◽  
Xin Liu ◽  
Yang Ming ◽  
Xiao Liu ◽  
Daniel Mahon ◽  
...  
Keyword(s):  
Insulation Material ◽  
Smart Window ◽  
Daylight Performance

scholarly journals High-Efficiency Responsive Smart Windows Fabricated by Carbon Nanotubes Modified by Liquid Crystalline Polymers

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 440
Author(s):  
Yuan Deng ◽  
Shi-Qin Li ◽  
Qian Yang ◽  
Zhi-Wang Luo ◽  
He-Lou Xie
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystalline ◽  
Near Infrared ◽  
High Efficiency ◽  
Polymer Brush ◽  
Light Transmittance ◽  
Smart Window ◽  
Vertical Orientation ◽  
Smart Windows ◽  
Conversion Materials

Smart windows can dynamically and adaptively adjust the light transmittance in non-energy or low-energy ways to maintain a comfortable ambient temperature, which are conducive to efficient use of energy. This work proposes a liquid crystal (LC) smart window with highly efficient near-infrared (NIR) response using carbon nanotubes grafted by biphenyl LC polymer brush (CNT-PDB) as the orientation layer. The resultant CNT-PDB polymer brush can provide the vertical orientation of LC molecules to maintain the initial transparency. At the same time, the smart window shows a rapid response to NIR light, which can quickly adjust the light transmittance to prevent sunlight from entering the room. Different from common doping systems, this method avoids the problem of poor compatibility between the LC host and photothermal conversion materials, which is beneficial for improving the durability of the device.

scholarly journals Manipulation of light transmission from stable magnetic microrods formed by the alignment of magnetic nanoparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 2390-2396
Author(s):  
Yoon Ji Seo ◽  
Hyung Gyu Lee ◽  
Jun Seok Yang ◽  
Hwanyeop Jeong ◽  
Jeonghun Han ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Nanoparticles ◽  
Light Transmission ◽  
Smart Window ◽  
Light Valve

Magnetic microrods were synthesised from magnetic nanoparticles by alignment using a magnetic field. The transparency difference was maximised and the anisotropic features of the rods were used as a light valve to control the transparency of a smart window.

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