نتایج جستجو برای: thermal property

تعداد نتایج: 371967  

2010
Y. GAO K. E. GOODSON

Temperature drops at the interfaces between thermoelectric materials and the heat source and sink reduce the overall efficiency of thermoelectric systems. Nanostructured interfaces based on vertically aligned carbon nanotubes (CNTs) promise the combination of mechanical compliance and high thermal conductance required for thermoelectric modules, which are subjected to severe thermomechanical st...

Journal: Nanomedicine Journal 2020
Kamyar Pourghazi, Mahsa Shahmirzadi Majid Amoli Diva

Objective(s): Today, there is an urgent need for improved sensor materials for drug sensing and effective monitoring and interventions in this area are highly required to struggle drug abuse. The present study aimed to synthesize a thioguanine-responsive sensor based on a nanocomposite consisting of AuNP-grafted light- and temperature-responsive poly butylmethacrylate-co-acrylamide-co-methacryl...

2010
Chunyi Y. Zhi Yoshio Bando Takeshi Terao Chengchun Tang Dmitri Golberg

We report the fabrication of and investigations into the dielectric and thermal properties of epoxy/boron nitride nanotube (BNNT) composites. It was found that BNNT fillers can effectively adjust the dielectric constant of epoxy. Moreover, the thermal conductivity of epoxy was improved by up to 69 % with 5 wt % BNNTs. Our studies indicate that BNNTs are promising nanofillers for polymers, to ob...

2014
Rad Sadri Goodarz Ahmadi Hussein Togun Mahidzal Dahari Salim Newaz Kazi Emad Sadeghinezhad Nashrul Zubir

Recently, there has been considerable interest in the use of nanofluids for enhancing thermal performance. It has been shown that carbon nanotubes (CNTs) are capable of enhancing the thermal performance of conventional working liquids. Although much work has been devoted on the impact of CNT concentrations on the thermo-physical properties of nanofluids, the effects of preparation methods on th...

2009
Takako Fukazawa Tomoko Ando Sachiyo Ikeda Ayu Yamaguchi Ingvar Holmér Yutaka Tochihara

INTRODUCTION Thermal stress becomes larger in the baby than in the adult, when they are exposed in a cold environment (Belghazi et al., 2005). This is because heat exchange in the baby is larger than in the adult due to the larger ratio of body surface area to body mass. Heat transfer form the body is also one of important factors to determine the level of the body heat exchange. Therefore, dis...

Abstract. Cancer is a major health problem all over the world. Photo thermal therapy (PTT) is a non-invasive method in cancer treatment. In PTT, the laser light usually in near-infra red region is absorbed and converted to heat in the cancerous tissue. The temperature above 40 ° C in PTT can induce some effects including irreversible damage to proteins, changes in enzyme struc...

ژورنال: مواد پرانرژی 2017

One way of thermal stability methods and ablation improving for polyurethane elastomers to solid propellant rocket insulation, is using of fillers with high ablation property such as silica particles. In this research, first polyurethane-silica composites (16, 25 and 38% by weight) and polyurethane-silica nanocomposites (5, 10, 16 and 25% by weight) were prepared and then interaction, morpholog...

2004
Raymond Atta-Fynn Parthapratim Biswas D. A. Drabold

From density-functional calculations, we show that localized states stemming from defects or topological disorder exhibit an anomalously large electron–phonon coupling. We provide a simple analysis to explain the observation and perform a detailed study on an interesting system: amorphous silicon. We compute firstprinciples deformation potentials (by computing the sensitivity of specific electr...

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2012
Vadym Adamyan Vladimir Zavalniuk

The thermal conductivity of doped graphene flake of finite size is investigated with emphasis on the influence of the mass of the substituting atoms on this property. It is shown that graphene doping by small concentrations of relatively heavy atoms results in a disproportionately large drop in lattice thermal conductivity.

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