Curcuminoid‐Based Difluoroboron Dyes as High‐Performance Photosensitizers in Long‐Wavelength (Yellow and Red) Cationic Photopolymerization

2019 ◽  
Vol 40 (20) ◽  
pp. 1900291 ◽  
Author(s):  
Weixiang Han ◽  
Jian You ◽  
Hui Li ◽  
Di Zhao ◽  
Jun Nie ◽  
...  
Keyword(s):  
High Performance ◽  
Long Wavelength ◽  
Cationic Photopolymerization

Effect of Substrate-Surface Orientation on the N Incorporation in GaAsN Films on GaAs Grown by MOVPE

2008 ◽  
Vol 55-57 ◽  
pp. 825-828 ◽  
Author(s):  
P. Klangtakai ◽  
S. Sanorpim ◽  
S. Kuboya ◽  
R. Katayama ◽  
Kentaro Onabe
Keyword(s):  
Growth Rate ◽  
High Performance ◽  
Substrate Surface ◽  
Surface Orientation ◽  
X Ray Diffraction ◽  
N Content ◽  
Long Wavelength ◽  
The Difference ◽  
N Incorporation ◽  
Novel Structures

The GaAs1-xNx alloy semiconductor has been grown on GaAs (001), (111)A and (011) substrates by metalorganic vapor-phase epitaxy. High resolution X-ray diffraction and Raman scattering were employed to examine the effective N content and the growth rate, as a function of the substrate-surface orientation. The growth rate, which was assessed though the clear Pendellösung fringes, and the N content were found to change dramatically with the substrate-surface orientations. The N content was determined in the order (111)A > (001) > (011). While, the growth rate is in the order, (001) > (011) > (111)A. The effect of substrate-surface orientation on the N incorporation found in the present study is interpreted in terms of the difference in the growth rate on each surface orientation and the number of dangling bonds with which the N atoms can be trapped on the growing surface. Our results show that controlled nitrogen incorporating for GaAsN is successfully achieved and can be applied to the fabrication of some novel structures such as a spontaneous N content modulated structure, which is applicable to high performance long wavelength laser diodes.

scholarly journals Pyropheophytin a Accompanies Pheophytin a in Darkened Light Grown Cells of Euglena1

1981 ◽  
Vol 36 (9-10) ◽  
pp. 827-833 ◽  
Author(s):  
Siegrid Schoch ◽  
Hugo Scheer ◽  
Jerome A. Schiff ◽  
Wolfhart Rüdiger ◽  
Harold W. Siegelman
Keyword(s):  
High Performance Liquid Chromatography ◽  
Absorption Spectrum ◽  
High Performance ◽  
Dilute Acid ◽  
Reverse Phase ◽  
Intact Cells ◽  
Pheophytin A ◽  
Long Wavelength ◽  
Dividing Cells ◽  
Ether Solution

Abstract Chromatography Light-grown non-dividing cells of Euglena gracilis Klebs var. bacillaris Cori form pheophytin a like pigments from chlorophyll a without loss of viability when they are allowed to incubate in darkness without shaking. This is accompanied by the loss of long-wavelength components in the red absorption band of intact cells. After extraction of these cells with acetone, transfer of the pigments to ether and treatment of the ether solution with dilute acid, two pigments can be separated by high performance liquid chromatography on reverse phase silica gel (RP-8) using methanol: water = 95:5 (v/v) as the eluting solvent: In addition to pheophytin a, the eluate contains an unknown pigment. With increasing times of incubation of the cells in darkness, the proportion of pheophytin a decreases and the proportion of the unknown increases suggesting, that the unknown is formed from pheophytin a. This pigment has been identified as pyropheophytin a. It has the same absorption spectrum as pyropheophytin a (prepared by pyridine pyrolysis of pheophytin a) and contains phytol as the longchain esterifying alcohol. On conversion to the methyl ester, the resulting methyl phorbide is identical with authentic pyromethylpheophorbide a by tic, hplc, absorption, absorption difference and mass spectros­ copy. This is the first report of pyropheophytin a or any pyrochlorophyll derivative from plants or oxygenic plant-like microorganisms where it may serve as an intermediate in chlorophyll degradation.

Mbe Growth and Characterization of Hgcdte Heterostructures

1990 ◽  
Vol 198 ◽  
Author(s):  
R.J. Koestner ◽  
M.W. Goodwin ◽  
H.F. Schaake
Keyword(s):  
High Performance ◽  
Misfit Dislocations ◽  
Mbe Growth ◽  
Long Wavelength ◽  
Fine Control ◽  
Critical Materials ◽  
Long Wavelength Infrared ◽  
Growth Technology ◽  
Very High

ABSTRACTHgCdTe heterostructures consisting of a thin n-type widegap (250 meV or 5 μm cutoff) layer deposited on an n-type narrowgap (100-125 meV or 10-13 μm cutoff) layer offer the promise of very high performance metal-insulator-semiconductor (MIS) photocapacitors for long wavelength infrared (LWIR) detection. Molecular Beam Epitaxy (MBE) is a candidate growth technology for these two layer films due to its fine control in composition, thickness and doping concentration. The critical materials issues are reducing the defect content associated with twins in the grown layers, achieving low net donor concentrations in the widegap layer, and avoiding the formation of misfit dislocations at the HgCdTe heterointerface. This paper will report on our recent progress in these directions.

(Invited) InAs/InAs1-XSbx Type-II Superlattices for High-Performance Long-Wavelength Infrared Medical Thermography

2015 ◽  
Vol 66 (7) ◽  
pp. 109-116
Author(s):  
M. Razeghi ◽  
A. Haddadi ◽  
G. Chen ◽  
R. Chevallier ◽  
A. M. Hoang
Keyword(s):  
High Performance ◽  
Type Ii ◽  
Long Wavelength ◽  
Type Ii Superlattices ◽  
Long Wavelength Infrared

High performance, long wavelength opto-electronic components by atmospheric pressure MOVPE

1986 ◽  
Vol 77 (1-3) ◽  
pp. 579-590 ◽  
Author(s):  
A.W. Nelson ◽  
S. Cole ◽  
S. Wong ◽  
M.J. Harlow ◽  
W.J. Devlin ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
High Performance ◽  
Electronic Components ◽  
Long Wavelength

Se & N co-doped carbon dots for high-performance fluorescence imaging agent of angiography

2017 ◽  
Vol 5 (25) ◽  
pp. 4988-4992 ◽  
Author(s):  
Dan Qu ◽  
Xiang Miao ◽  
Xintong Wang ◽  
Chuang Nie ◽  
Yuxin Li ◽  
...  
Keyword(s):  
Fluorescence Imaging ◽  
Carbon Dots ◽  
High Performance ◽  
Imaging Agent ◽  
Long Wavelength ◽  
Doped Carbon Dots ◽  
Fluorescent Carbon Dots ◽  
Co Doped ◽  
Fluorescent Carbon

Both long wavelength excitation and emission are highly desired for fluorescent carbon dots in bio-related applications.

Sign in / Sign up

Export Citation Format

Share Document