scholarly journals Ultrafast far-infrared optics of carbon nanotubes

2009 ◽  
Author(s):  
C. Frischkorn ◽  
T. Kampfrath ◽  
L. Perfetti ◽  
K. von Volkmann ◽  
M. Wolf
Keyword(s):  
Carbon Nanotubes ◽  
Far Infrared ◽  
Infrared Optics

scholarly journals Influence of Far Infrared TiO2 and Multi-Walled Carbon Nanotubes Coatings on the Performance of a Hot Water Heater

2021 ◽  
Vol 11 (15) ◽  
pp. 7043
Author(s):  
Tun-Ping Teng ◽  
Shang-Pang Yu ◽  
Yeou-Feng Lue ◽  
Qi-Lin Xie ◽  
Hsiang-Kai Hsieh ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Heating Rate ◽  
Heat Insulation ◽  
Far Infrared ◽  
Hot Water ◽  
Insulation Material ◽  
Water Heater ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Insulation Performance

This study selects titanium dioxide (TiO2) and multi-walled carbon nanotubes (MWCNTs) as far-infrared materials (FIRMs), and further adds water-based acrylic coatings to prepare far-infrared coatings (FIRCs). FIRCs are uniformly coated on #304 stainless steel sheets to make the test samples, which are then installed between the shell and insulation material of the hot water heater to measure the influences of various FIRCs on the performance of the hot water heater. The research results show no significant difference in the heating rate or heat insulation performance of the hot water heater with or without FIRCs coating. However, the uniformity of the water temperatures of the test samples is significantly improved with FIRCs. Considering that the uniformity of water temperature will inhibit the heating rate and heat insulation performance of the hot water heater, TiO2-FIRC should provide better performance improvement when applied to the hot water heater in this study. The application of TiO2-FIRC to large-scale hot water heaters with a high aspect ratio will effectively improve the quality of hot water supply in the future.

Recent Research in Far Infrared Optics in Japan

1964 ◽  
Vol 3 (7) ◽  
pp. 805 ◽  
Author(s):  
Hiroshi Yoshinaga
Keyword(s):  
Far Infrared ◽  
Infrared Optics

Far-Infrared gaps in single-wall carbon nanotubes

2001 ◽  
Vol 249 (1) ◽  
pp. 145-154 ◽  
Author(s):  
A. Ugawa ◽  
A. G. Rinzler ◽  
D. B. Tanner
Keyword(s):  
Carbon Nanotubes ◽  
Far Infrared ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

Far Infrared Laser Detector Based on Multi-Walled Carbon Nanotubes and Blend of (Polyaniline - Polymethyl Methacrylate) Polymers with Methyl Blue Dye for Photoconductive Applications

2021 ◽  
Vol 33 ◽  
pp. 93-103
Author(s):  
Wasan R. Saleh ◽  
Salma M. Hassan ◽  
Samar Y. Al-Dabagh ◽  
Marwa A. Marwa
Keyword(s):  
Carbon Nanotubes ◽  
Polymethyl Methacrylate ◽  
Forward Bias ◽  
Far Infrared ◽  
Methyl Blue ◽  
Blue Dye ◽  
Ir Radiation ◽  
Figures Of Merit ◽  
Photoconductive Detectors ◽  
Laser Detector

Infrared photoconductive detectors working in the far-infrared region and room temperature were fabricated. The detectors were fabricated using three types of carbon nanotubes (CNTs); MWCNTs, COOH-MWCNTs, and short-MWCNTs. The carbon nontubes suspension is deposited by dip coating and drop–casting techniques to prepare thin films of CNTs. These films were deposited on porous silicon (PSi) substrates of n-type Si. The I-V characteristics and the figures of merit of the fabricated detectors were measured at a forward bias voltage of 3 and 5 volts as well as at dark and under illumination by IR radiation from a CO2 laser of 10.6 μm wavelengths and power of 2.2 W. The responsivity and figures of merit of the photoconductive detector are improved by coating the MWCNTs films with a thin layer of a blend (polyaniline - polymethyl methacrylate) polymer with methylene blue dye. The coated MWCNTs films showed better performances, so this type of coating can be considered as a surface treatment of the detector film, which highly increased the responsivity and specific detectivity of the fabricated IR laser detector-based MWCNTs. The photocurrent response for the coated films was increased about 25 times than that for uncoated films. The results proved the role of the polymer in the enhancement of the performance of the IR photoconductive detectors. Keywords: Carbon nanotubes, Infrared detector, Polyaniline polymer, Polymethyl methacrylate polymer, Methyl Blue dye.

The theory of far-infrared optics of layered antiferromagnets

1995 ◽  
Vol 7 (14) ◽  
pp. 2717-2730 ◽  
Author(s):  
K Abraha ◽  
D R Tilley
Keyword(s):  
Far Infrared ◽  
Infrared Optics

Preparation of Tourmaline and Carbon Nanotubes Based Composite Materials and its Heat Emission Performance

2012 ◽  
Vol 427 ◽  
pp. 110-114
Author(s):  
Gang Xue ◽  
Ran Yu ◽  
Sai Fei Wang ◽  
Chao Yue Zhao
Keyword(s):  
Carbon Nanotubes ◽  
Composite Materials ◽  
Transition Metal Oxides ◽  
Far Infrared ◽  
Infrared Emission ◽  
Heat Emission ◽  
Mass Percentage ◽  
Natural Mineral ◽  
Emission Performance ◽  
Thermal Coating

The tourmaline-based composite materials as an effective thermal coating of heat exchanger unit were prepared from natural mineral tourmaline, transition metal oxides and carbon nanotubes. The far infrared emission properties and heat emission performance were studied. The results indicated that thermal performance of materials can be adjusted with the chemical composition of materials, and when the mass percentage of carbon nanotubes is 10%, the fractional of 26.77% of energy saving efficiency can be achieved.

Sign in / Sign up

Export Citation Format

Share Document