Room temperature Near-IR photoluminescence from ethylenediamine assisted solvo-hydrothermally grown wurtzite ZnS:Nd2O3 system

2021 ◽  
Vol 257 ◽  
pp. 123713
Author(s):  
P. Sajan ◽  
C.K. Krishna Sagar ◽  
N.G. Divya ◽  
G. Subodh ◽  
M. Junaid Bushiri
Keyword(s):  
Room Temperature ◽  
Near Ir

scholarly journals Absorption and Emission Spectra for C60 Anions

1994 ◽  
Vol 14 (1-3) ◽  
pp. 155-160 ◽  
Author(s):  
Tatsuhisa Kato
Keyword(s):  
Absorption Spectrum ◽  
Absorption Band ◽  
Theoretical Analysis ◽  
Room Temperature ◽  
Emission Spectra ◽  
Mirror Image ◽  
Ir Absorption ◽  
Near Ir ◽  
Laser Experiments ◽  
Ir Bands

Absorption spectra are detected for C60− and C602− produced electrolytically in solution at room temperature. Theoretical analysis of the spectrum of C60− by CNDO/S calculations gives an interpretation of the characteristic near-IR bands, the weak visible bands, and the strong bands in the UV region. The emission spectrum of C60− is a mirror image of the near-IR absorption band, and the detection of the emission reconfirms our original assignment of the absorption spectrum. The nature of the spectrum of C602− is characterized by a similar orbital picture to that of C60−. Further laser experiments of significance are proposed.

Room-temperature near IR fluorescence of high optical quality KTP

2007 ◽  
Author(s):  
S. M. Hegde ◽  
K. L. Schepler ◽  
R. D. Peterson ◽  
D. E. Zelmon
Keyword(s):  
Room Temperature ◽  
Optical Quality ◽  
High Optical Quality ◽  
Near Ir

Photosensitive Amorphous Si Thin Films Prepared by Magnetron Technology.

2002 ◽  
Vol 744 ◽  
Author(s):  
Galina Khlyap ◽  
Victor Brytan
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Continuous Mode ◽  
Applied Bias ◽  
Near Ir ◽  
Current Voltage ◽  
Exponential Character ◽  
Current Voltage Characteristics ◽  
Amorphous Si ◽  
Spectral Ranges

ABSTRACTElectric field – induced effects are studied in thin films of amorphous Si grown by magnetron sputtering performed in continuous and pulse modes. Current-voltage characteristics are measured under the room temperature in different spectral ranges. It is shown that the investigated dependencies are of exponential character in all range of applied bias. Good photosensitivity was revealed by the samples prepared in continuous mode in the near-IR and visible interval. The samples grown by the pulse magnetron technology were shown room-temperature photosensitivity in near-IR range after 2000C hydrogenation.

Solid-State Infrared Photoacoustic Spectra of Group 6B Metal Mixed Carbonyl-t-Butylisocyanide Complexes, M(CO)6-n(CNtBu)n(M = Cr, Mo, W; n = 1–3)

1993 ◽  
Vol 47 (2) ◽  
pp. 218-221 ◽  
Author(s):  
Hongqi Li ◽  
Ian S. Butler
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Organometallic Complexes ◽  
Vibrational Assignments ◽  
Photoacoustic Spectra ◽  
Near Ir

Solid-state mid- and near-IR photoacoustic (PA) spectra have been measured at room temperature for the group 6B metal(0) mixed carbonyl- t-butylisocyanide complexes M(CO)6- n(CN tBu) n ( M = Cr, Mo, W; n = 1-3). Vibrational assignments are proposed for many of the observed bands. The PA spectra in the near-IR region (4600-3600 cm−1), where the binary v(CN) and v(CO) overtones and combinations absorb, are useful spectral fingerprints for these organometallic complexes.

Preparation and Properties of Gadolinium Homoleptic Double-and Triple-Decker Complexes Containing Tetrabenzoporphyrin Ligand

2013 ◽  
Vol 750-752 ◽  
pp. 1816-1821
Author(s):  
Qi Feng Liu
Keyword(s):  
Room Temperature ◽  
Spin Exchange ◽  
Spectroscopic Studies ◽  
Magnetic Interactions ◽  
Antiferromagnetic Coupling ◽  
Ir Absorption ◽  
Magnetic Studies ◽  
Absorption Bands ◽  
Near Ir ◽  
Sandwich Type

Two novel gadolinium sandwich-type complexes containing tetrabenzoporphyrin (TBP) ligands-Gd (TBP)2and Gd (TBP)3were prepared from porphyrin 1 and Gd (acac)3. nH2O under Ar by boiling 1, 2, 4-Tcb for 15~17h and 45~48 h respectively. Their structures are characterized by Uv-Vis, HR-MS and IR. The spectroscopic studies show that their longest-wavelength visible and near-IR absorption bands are obviously red-shifted due to the extension of the π conjugated systems in the TBP ring. The magnetic studies indicate that the observed value of χMT for Gd (TBP)2is close to the combined value of Gd (III) and porphyrin radical anion at room temperature and that antiferromagnetic interaction possibly results from the intramolecular spin exchange between the porphyrin π-radical electron and that the gadolinium f unpaired electrons dominates its magnetic properties over the whole temperature range while there is no magnetic interactions between two Gd (III) ions in Gd (TBP)3in the range from room temperature down to 20K and very weak antiferromagnetic coupling exsits between two Gd (III) ions below 20K.

FT-IR Photoacoustic Spectra of Some Solid Organometallic Complexes of Chromium, Manganese, Rhenium, and Iron

1987 ◽  
Vol 41 (1) ◽  
pp. 149-153 ◽  
Author(s):  
Ian S. Butler ◽  
Zhen H. Xu ◽  
Rita S. Werbowyj ◽  
Francois St.-Germain
Keyword(s):  
Solid State ◽  
Alkali Halide ◽  
Room Temperature ◽  
Organometallic Compounds ◽  
Rapid Identification ◽  
Organometallic Complexes ◽  
Vibrational Assignments ◽  
Photoacoustic Spectra ◽  
Near Ir ◽  
Ft Ir

FT-IR photoacoustic spectra have been measured at room temperature in the near- and mid-IR range (4700–500 cm−1) for the solid organometallic compounds: CpM(CO)3 (Cp = η5-C5H5; M = Mn, Re); CpMn(CO)2(CS); [CpFe(CO)2]2; [CpMo(CO)3]2; BzCr(CO)3 (Bz = η6-C6H6); BzCr(CO)2(CS); M2(CO)10 (M = Mn, Re); and Fe2(CO)9. Vibrational assignments have been made for the fundamentals and the binary overtone and combination regions. It is much simpler to obtain data for the 4700–3500 cm−1 near-IR region with the use of PA rather than transmission IR spectroscopy with alkali halide disks since there are no problems with scattering or internal multiple reflectance. FT-IR photoacoustic spectroscopy is a convenient, nondestructive analytical method that should prove extremely useful to organometallic chemists for the rapid identification of their compounds in the solid state.

Extended near-IR Spectral Sensitivity and Electroluminescence Properties of Silicon Diode Structure with GaSb/Si Composite Layer

2016 ◽  
Vol 247 ◽  
pp. 61-65 ◽  
Author(s):  
Dmitry L. Goroshko ◽  
Alexander V. Shevlyagin ◽  
Evgeniy Anatolievich Chusovitin ◽  
Konstantin N. Galkin ◽  
Igor M. Chernev ◽  
...  
Keyword(s):  
Spectral Sensitivity ◽  
Wavelength Range ◽  
Room Temperature ◽  
Solid Phase ◽  
Composite Layer ◽  
Solid Phase Epitaxy ◽  
Silicon Matrix ◽  
Near Ir ◽  
Wide Wavelength Range ◽  
Integral Sensitivity

An array of GaSb nanocrystallites (NCs) was formed on Si(001) substrate by solid-phase epitaxy at 500 °C. Owing to the embedded GaSb NCs, p+‑Si/NC‑GaSb/n‑Si mesa diode spectral sensitivity has extended up to 1.6 µm at room temperature, and its integral sensitivity has increased by 4–5% in the wavelength range of 1200–1600 nm, as compared to a conventional Si diode. This result was achieved by embedding only 10 nm of GaSb in the form of NCs inside a silicon matrix. In addition, we could obtain a significant electroluminescence (EL) signal at 120 K in a very wide wavelength range from 1.3 to 2.1 µm (0.95–0.59 eV). The EL spectrum has a broad maximum at 1700 nm (0.73 eV). The threshold pumping current density was as low as 0.75 A/cm2.

Nanoemulsion Synthesis of Magnetic-Optical CoNiAu Nanoparticles

2014 ◽  
Vol 904 ◽  
pp. 90-94
Author(s):  
Hong Qin Shao ◽  
Zheng Guan ◽  
Jun Hua Wu ◽  
Hong Ling Liu
Keyword(s):  
Magnetic Properties ◽  
Biomedical Applications ◽  
Room Temperature ◽  
Vibrating Sample Magnetometry ◽  
Tem Analysis ◽  
X Ray ◽  
Near Ir ◽  
Transmission Electron ◽  
Optical And Magnetic Properties

Multi-functional CoNiAu nanoparticles were successfully synthesized via nanoemulsion method with the use of PEO-PPO-PEO as the surfactant, C14H29CH(OH)CH2OH as the reducing agent, Ni (acac)2, Co (acac)2 and Au (ac)3 as precursors. The characterization of the CoNiAu nanoparticles was performed using X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and UV-vis near IR spectrophotometer (UV-vis). The XRD and TEM analysis confirm the formation and structure of the nanoparticles. The UV-vis and VSM measurements display the optical and magnetic properties of the CoNiAu nanoparticles at the room temperature. The CoNiAu nanoparticles with the well defined optical and magnetic properties are promised for optical, magnetic, catalytic and biomedical applications.

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