Time variation of GaN photoelectrochemical reactions affected by light intensity and applied bias

ABSTRACTPreliminary results on the response of type Ib and IIa diamond photodetectors to fast laser pulse exposures at 265 and 530 nm are presented. The influence of the applied bias, the laser wavelengths and the light intensity on the detector sensitivity is studied. Also, recent measurements with 1.25 MeV gamma ray pulses are reported.

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Surface state controlled ultrahigh selectivity and sensitivity for UV photodetectors based on individual SnO2 nanowires

Journal of Materials Chemistry C ◽

10.1039/c6tc02420c ◽

2016 ◽

Vol 4 (36) ◽

pp. 8399-8406 ◽

Cited By ~ 25

Author(s):

Haiping Shi ◽

Baochang Cheng ◽

Qiangsheng Cai ◽

Xiaohui Su ◽

Yanhe Xiao ◽

...

Keyword(s):

Light Intensity ◽

Bias Voltage ◽

Surface State ◽

High Performance ◽

Surface States ◽

Applied Bias ◽

Applied Bias Voltage ◽

Uv Photodetectors ◽

Sno2 Nanowires

Surface states are utilized for the development of high-performance photodetectors based on individual SnO2 nanowires. Their photodetectivity strongly depends on externally applied bias voltage and illuminated light intensity.

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Charge accumulation kinetics in multi-redox molecular catalysts immobilised on TiO2

Chemical Science ◽

10.1039/d0sc04344c ◽

2021 ◽

Author(s):

Carlota Bozal-Ginesta ◽

Camilo A. Mesa ◽

Annika Eisenschmidt ◽

Laia Francàs ◽

Ravi B. Shankar ◽

...

Keyword(s):

Light Intensity ◽

Charge Accumulation ◽

Applied Bias ◽

Accumulation Kinetics ◽

Molecular Catalysts

Using transient spectroelectrochemical techniques, we investigate multiply reduced states of molecular catalysts on titania photoelectrodes as a function of the applied bias and the light intensity.

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Fine structure of the retina of the giant scallop, Placopecten magellanicus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100111677 ◽

1984 ◽

Vol 42 ◽

pp. 312-313

Author(s):

C.V.L. Powell

Keyword(s):

Fine Structure ◽

Electron Microscope ◽

Light Intensity ◽

Scanning Electron Microscope ◽

Eye Development ◽

Preliminary Observation ◽

Columnar Epithelium ◽

Placopecten Magellanicus ◽

Environmental Light ◽

Scanning Electron

The overall fine structure of the eye in Placopecten is similar to that of other scallops. The optic tentacle consists of an outer columnar epithelium which is modified into a pigmented iris and a cornea (Fig. 1). This capsule encloses the cellular lens, retina, reflecting argentea and the pigmented tapetum. The retina is divided into two parts (Fig. 2). The distal retina functions in the detection of movement and the proximal retina monitors environmental light intensity. The purpose of the present study is to describe the ultrastructure of the retina as a preliminary observation on eye development. This is also the first known presentation of scanning electron microscope studies of the eye of the scallop.

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Effect of light intensity on the ultrastructure of the filamentous cyanobacterium, Anabaena variabilis

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100103565 ◽

1988 ◽

Vol 46 ◽

pp. 300-301

Author(s):

C. S. Bricker ◽

S. R. Barnum ◽

B. Huang ◽

J. G. Jaworskl

Keyword(s):

Fatty Acid ◽

Light Intensity ◽

Acid Content ◽

Fatty Acid Content ◽

Anabaena Variabilis ◽

Chloroplast Envelope ◽

Major Constituent ◽

Filamentous Cyanobacterium ◽

Photosynthetic Membrane ◽

Effect Of Light

Cyanobacteria are Gram negative prokaryotes that are capable of oxygenic photosynthesis. Although there are many similarities between eukaryotes and cyanobacteria in electron transfer and phosphorylation during photosynthesis, there are two features of the photosynthetic apparatus in cyanobacteria which distinguishes them from plants. Cyanobacteria contain phycobiliproteins organized in phycobilisomes on the surface of photosynthetic membrane. Another difference is in the organization of the photosynthetic membranes. Instead of stacked thylakolds within a chloroplast envelope membrane, as seen In eukaryotes, IntracytopIasmlc membranes generally are arranged in three to six concentric layers. Environmental factors such as temperature, nutrition and light fluency can significantly affect the physiology and morphology of cells. The effect of light Intensity shifts on the ultrastructure of Internal membrane in Anabaena variabilis grown under controlled environmental conditions was examined. Since a major constituent of cyanobacterial thylakolds are lipids, the fatty acid content also was measured and correlated with uItrastructural changes. The regulation of fatty acid synthesis in cyanobacteria ultimately can be studied if the fatty acid content can be manipulated.

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Inter-Method Reliability of Pulse Volume Related Measures Derived Using Finger-Photoplethysmography

Journal of Psychophysiology ◽

10.1027/0269-8803/a000197 ◽

2018 ◽

Vol 32 (4) ◽

pp. 182-190 ◽

Cited By ~ 4

Author(s):

Kenta Matsumura ◽

Koichi Shimizu ◽

Peter Rolfe ◽

Masanori Kakimoto ◽

Takehiro Yamakoshi

Keyword(s):

Light Intensity ◽

Adverse Effects ◽

Light Source ◽

Direct Current ◽

Resting State ◽

Current Component ◽

Psychophysiological Measures ◽

Pulse Volume ◽

Optical Paths ◽

Sensor Positions

Abstract. Pulse volume (PV) and its related measures, such as modified normalized pulse volume (mNPV), direct-current component (DC), and pulse rate (PR), derived from the finger-photoplethysmogram (FPPG), are useful psychophysiological measures. Although considerable uncertainties exist in finger-photoplethysmography, little is known about the extent of the adverse effects on the measures. In this study, we therefore examined the inter-method reliability of each index across sensor positions and light intensities, which are major disturbance factors of FPPG. From the tips of the index fingers of 12 participants in a resting state, three simultaneous FPPGs having overlapping optical paths were recorded, with their light intensity being changed in three steps. The analysis revealed that the minimum values of three coefficients of Cronbach’s α for ln PV, ln mNPV, ln DC, and PR across positions were .948, .850, .922, and 1.000, respectively, and that those across intensities were .774, .985, .485, and .998, respectively. These findings suggest that ln mNPV and PR can be used for psychophysiological studies irrespective of minor differences in sensor attachment positions and light source intensity, whereas and ln DC can also be used for such studies but under the condition of light intensity being fixed.

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