Enhancing functionalities of organic ultraviolet-visible phototransistors incorporating spiropyran-merocyanine photochromic materials

2021 ◽  
Vol 9 (39) ◽  
pp. 22522-22532
Author(s):  
Ren-Jie Wu ◽  
Yueh-Ling Hsu ◽  
Wei-Yang Chou ◽  
Horng-Long Cheng
Keyword(s):  
Visible Light ◽  
Energy Saving ◽  
Ultraviolet Light ◽  
Photochromic Materials

A photoexcited merocyanine molecule triggers several distinct photoresponse features of organic phototransistors, enabling distinction between ultraviolet light and visible light and realising an energy-saving optical synapse.

scholarly journals Rare earth oxynitrides: Promising visible-light-driven photocatalysts for water splitting

2021 ◽  
Author(s):  
Shijia Jiang ◽  
Yanxin Liu ◽  
Jun Xu
Keyword(s):  
Rare Earth ◽  
Visible Light ◽  
Water Splitting ◽  
Ultraviolet Light ◽  
Energy Crisis ◽  
Potential Solution ◽  
Global Energy ◽  
Ultraviolet Light Irradiation ◽  
Visible Light Driven ◽  
Main Component

Photocatalytic water splitting is a potential solution for global energy crisis. However, most photocatalysts only respond to ultraviolet light irradiation, which is not the main component of sunlight. The photocatalysis...

scholarly journals Problems and Prospects of Nanometer Transparent Infrared Thermal Insulation Glass

2018 ◽  
Vol 53 ◽  
pp. 01013
Author(s):  
Nan Zhang ◽  
Mengyuan Xu ◽  
Ning Li
Keyword(s):  
Energy Conservation ◽  
Visible Light ◽  
Energy Saving ◽  
Building Energy ◽  
Light Transmittance ◽  
Large Area ◽  
Existing Building ◽  
Economic Application ◽  
Performance Indexes ◽  
Building Energy Saving

The existing building energy-saving reconstruction has a large area in our country. If the performance indexes such as the shading coefficient, visible light transmittance and hardness of the coating heat-insulating glass are in the condition of reaching the specification, and it can meet the needs of energy conservation and reform in building, it is a suitable technology for economic application.

COMPARISON OF THE EFFECTS OF VISIBLE, ULTRAVIOLET, AND X-RADIATION ON RAT THYMOCYTES

1964 ◽  
Vol 42 (4) ◽  
pp. 529-543 ◽  
Author(s):  
D. K. Myers ◽  
Donna DeWolfe-Slade
Keyword(s):  
Nucleic Acid ◽  
Visible Light ◽  
Ultraviolet Light ◽  
Intact Cell ◽  
Lethal Effect ◽  
Low Doses ◽  
X Irradiation ◽  
Thymus Cells ◽  
Ultraviolet Energy

Ultraviolet and X-irradiation produce many of the same effects on rat thymocytes in vitro. Exposure of the cells to low doses results in a latent lethal effect, which requires incubation at 37 °C for its expression, and in an apparent increase in the rate at which deoxyribonucleoprotein from the cells dissolves to form a gel in 2 M NaCl. As the doses are increased, a decrease in the viscosity of the deoxyribonucleoprotein gel, an immediate "death" and swelling of the cells, and an immediate destruction of nucleotide bases become evident. For either radiation, doses which do not appear to have any immediate effect on the intact cell lead to loss of soluble materials (potassium ion, ribonucleotides) from the cells after incubation at 37 °C for several hours. The amount of ultraviolet energy required to produce most of the above effects is nearly 1000 times greater than the amount of X-ray energy required to produce the same effect.Three differences between the effects of ultraviolet and X-irradiation were observed: Ultraviolet light was relatively inefficient in breaking down the long deoxyribonucleoprotein chains but appeared to destroy hydrogen-bonding in the native nucleic acid structure at the same time as it destroyed the nucleotide basis. Moreover, the lethal effects of low doses of ultraviolet light on thymus cells require a longer time to develop than do the effects of X-irradiation.Thymocytes can also be killed by high intensities of visible light, particularly in the presence of photoreducible dyes. However, visible light produces little or no latent damage to the cells, nor was any evidence of nucleic acid damage observed.

Preparation and Characterization of Ag/TiO2-xNx Nanoparticles

2007 ◽  
Vol 534-536 ◽  
pp. 105-108
Author(s):  
Zhong Qing Liu ◽  
Zheng Hua Li ◽  
Yan Ping Zhou ◽  
Chang Chun Ge
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Ultraviolet Light ◽  
Hole Pair ◽  
Electron Hole ◽  
Photoexcited Electron ◽  
Photochemical Deposition ◽  
Electron Hole Pair

The Ag/TiO2-xNx nanoparticles were synthesized by photochemical deposition with irradiation of visible light in a TiO2-XNX suspension system. The prepared products were characterized by means of XRD, Uv-vis, and FEM. Its photocatalytic activity was investigated by the decomposition of methylene blue (MB) solution under illumination of visible and ultraviolet light, respectively. Compared to TiO2-xNx, the photocatalytic activity of as–prepared Ag/TiO2-xNx is obviously enhanced due to the decreasing recombination of a photoexcited electron-hole pair. The mechanism in which photocatalytic activity is enhanced is discussed in detail.

Synthesis and Preparation of Eu(BA)3Phen and its Fluorescent Falsification-Resistant Screen Printing Ink

2015 ◽  
Vol 1096 ◽  
pp. 336-339
Author(s):  
Jie Meng
Keyword(s):  
Visible Light ◽  
Ultraviolet Light ◽  
Ir Spectrum ◽  
Screen Printing ◽  
Europium Complex ◽  
Fluorescent Properties ◽  
Uv Spectrum ◽  
Europium Ion ◽  
Characteristic Emission ◽  
Printing Ink

Europium complex Eu (BA)3Phen was synthesised by selecting the fine Benzoyl acetone (BA) as the first ligand, o-phenanthroline (Phen) as the second ligand . IR spectrum indicated that europium ion has bonded with the ligands. The fluorescent properties and UV spectrum were studied. And fluorescent falsification-resistant screen printing ink was prepared , the fluorescent ink showed the characteristic emission of Eu3+, showed invisible in the visible light and showed obvious fluorescence under ultraviolet light.

Clean Energy Generation by a Nanostructured Biophotofuel Cell

2013 ◽  
Author(s):  
Xiaolu Liu ◽  
Yang Liu ◽  
Kai Ren ◽  
Paul Lawson ◽  
Andrew Moening ◽  
...  
Keyword(s):  
Visible Light ◽  
Ultraviolet Light ◽  
Sodium Sulfide ◽  
Clean Energy ◽  
Energy Generation ◽  
Tio2 Nanotube ◽  
Light Illumination ◽  
Photoelectrochemical Response ◽  
Sodium Sulfide Solution ◽  
Sulfide Solution

In this paper, clean energy generation from hazardous materials by a nanostructured biophotofuel cell was studied. Specifically, electrodeposition of polyaniline on TiO2 nanotube as photoelectrochemical anode for a sodium sulfide fuel cell was performed. The photoelectrochemical response of the TiO2 nanotube capped by polyaniline nanoparticles was studied in UV and visible light illumination using sodium sulfide as the electrolyte. The polyaniline was added onto the top end of the nanotube via electrochemical deposition from 0.1 M aniline (C6H7N) in 1 M HCl solution. Polyaniline nanoparticle/TiO2 nanotube was made into an anode and put into 0.5 M sodium sulfide solution for photoelectrochemical response tests under both visible and ultraviolet light irradiation. The photoelectrochemical anode shows good photo-catalytic property, as evidenced by the open circuit potential changes when the illumination conditions were changed. Its response to ultraviolet light is much stronger than to visible light. It is also found that the higher the temperature of the sodium sulfide solution, the weaker the photo-catalytic response of the anode.

scholarly journals Ultraviolet Photodetecting and Plasmon-to-Electric Conversion of Controlled Inkjet-Printing Thin-Film Transistors

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 458 ◽  
Author(s):  
Cheng-Jyun Wang ◽  
Hsin-Chiang You ◽  
Jen-Hung Ou ◽  
Yun-Yi Chu ◽  
Fu-Hsiang Ko
Keyword(s):  
Thin Film ◽  
Visible Light ◽  
Ultraviolet Light ◽  
Channel Structure ◽  
Oxygen Plasma Treatment ◽  
Plasmon Energy ◽  
Light Power ◽  
Ink Jet Printing ◽  
Ink Jet ◽  
Jet Printing

Direct ink-jet printing of a zinc-oxide-based thin-film transistor (ZnO-based TFT) with a three-dimensional (3-D) channel structure was demonstrated for ultraviolet light (UV) and visible light photodetection. Here, we demonstrated the channel structures by which temperature-induced Marangoni flow can be used to narrow the channel width from 318.9 ± 44.1 μm to 180.1 ± 13.9 μm via a temperature gradient. Furthermore, a simple and efficient oxygen plasma treatment was used to enhance the electrical characteristics of switching ION/IOFF ratio of approximately 105. Therefore, the stable and excellent gate bias-controlled photo-transistors were fabricated and characterized in detail for ultraviolet (UV) and visible light sensing. The photodetector exhibited a superior photoresponse with a significant increase of more than 2 orders of magnitude larger drain current generated upon UV illumination. The results could be useful for the development of UV photodetectors by the direct-patterning ink-jet printing technique. Additionally, we also have successfully demonstrated that a metal-semiconductor junction structure that enables plasmon energy detection by using the plasmonic effects is an efficient conversion of plasmon energy to an electrical signal. The device showed a significant variations negative shift of threshold voltage under different light power density with exposure of visible light. With the ZnO-based TFTs, only ultraviolet light detection extends to the visible light wavelength.

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