scholarly journals Largely Lowered Transition Temperature of a VO2 /Carbon Hybrid Phase Change Material with High Thermal Emissivity Switching Ability and Near Infrared Regulations

2018 ◽  
Vol 5 (21) ◽  
pp. 1801063 ◽  
Author(s):  
Shancheng Wang ◽  
Guowei Liu ◽  
Peng Hu ◽  
Yang Zhou ◽  
Yujie Ke ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Phase Change ◽  
Phase Change Material ◽  
Near Infrared ◽  
Thermal Emissivity ◽  
Change Material

Synthesis and Study of Microcapsules with Beeswax Core and Phenol-Formaldehyde Shell Using the Taguchi Method

2021 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Tejashree Amberkar ◽  
Prakash Mahanwar
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Taguchi Method ◽  
Phase Change ◽  
Phase Change Material ◽  
Surfactant Concentration ◽  
Phenol Formaldehyde ◽  
Processing Parameters ◽  
Agitation Speed ◽  
Change Material

Phenol-formaldehyde shelled phase change material microcapsules (MPCMs) were fabricated and their processing parameters were analyzed with the Taguchi method. Core to shell ratio, surfactant concentration and speed of mixing are the parameters that were optimized in five levels. The optimized values for the surfactant concentration, core to shell ratio and agitation speed were 3%, 1:1 and 800 rpm, respectively. The obtained microcapsules were spherical in shape. The melting enthalpy of the MPCMs synthesized with optimized processing parameters was 148.93 J/g in 35–62 °C. The obtained temperature range of phase transition temperature can be used for storing different food articles such as chocolate and hot served foods.

Tunable broadband near-infrared absorber based on ultrathin phase-change material

2017 ◽  
Vol 403 ◽  
pp. 166-169 ◽  
Author(s):  
Er-Tao Hu ◽  
Tong Gu ◽  
Shuai Guo ◽  
Kai-Yan Zang ◽  
Hua-Tian Tu ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Near Infrared ◽  
Change Material

scholarly journals High Q Resonant Graphene Absorber with Lossless Phase Change Material Sb2S3

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2820
Author(s):  
Qi Meng ◽  
Xingqiao Chen ◽  
Wei Xu ◽  
Zhihong Zhu ◽  
Shiqiao Qin ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Near Infrared ◽  
Infrared Region ◽  
Q Factor ◽  
Thermal Emitters ◽  
Crystallization Fraction ◽  
Q Factors ◽  
Refractive Index Grating ◽  
Change Material

Graphene absorbers have attracted lots of interest in recent years. They provide huge potential for applications such as photodetectors, modulators, and thermal emitters. In this letter, we design a high-quality (Q) factor resonant graphene absorber based on the phase change material Sb2S3. In the proposed structure, a refractive index grating is formed at the subwavelength scale due to the periodical distributions of amorphous and crystalline states, and the structure is intrinsically flat. The numerical simulation shows that nearly 100% absorption can be achieved at the wavelength of 1550 nm, and the Q factor is more than hundreds due to the loss-less value of Sb2S3 in the near-infrared region. The absorption spectra can be engineered by changing the crystallization fraction of the Sb2S3 as well as by varying the duty cycle of the grating, which can be employed not only to switch the resonant wavelength but also to achieve resonances with higher Q factors. This provides a promising method for realizing integrated graphene optoelectronic devices with the desired functionalities.

scholarly journals Author Correction: Near-infrared tunable metalens based on phase change material Ge2Sb2Te5

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Wei Bai ◽  
Ping Yang ◽  
Jie Huang ◽  
Dingbo Chen ◽  
Jingjing Zhang ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Near Infrared ◽  
Change Material

All-Dielectric Metasurface-Enabled Near-Infrared Switching Based on Ge2Sb2Te5 Phase-Change Material

2020 ◽  
Vol 49 (6) ◽  
pp. 3913-3919 ◽  
Author(s):  
Prateek Mishra ◽  
Vibhu Srivastava ◽  
Mirgendar Kumar ◽  
Sunny
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Near Infrared ◽  
Change Material ◽  
Dielectric Metasurface

scholarly journals Near-infrared nano-spectroscopy and emission energy control of semiconductor quantum dots using a phase-change material

2013 ◽  
Vol 471 ◽  
pp. 012007 ◽  
Author(s):  
Nobuhiro Tsumori ◽  
Motoki Takahashi ◽  
Nurrul Syafawati Humam ◽  
Phillipe Regreny ◽  
Michel Gendry ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Phase Change ◽  
Phase Change Material ◽  
Near Infrared ◽  
Semiconductor Quantum Dots ◽  
Energy Control ◽  
Emission Energy ◽  
Change Material
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