Emergence and origin of broader light emission from two-dimensional layered (C12H25NH3)2MnCl4 at low-temperatures

2021 ◽  
Author(s):  
Madhu Bochalya ◽  
Anand Nivedan ◽  
Sandeep Kumar ◽  
Arvind Singh ◽  
Sunil Kumar
Keyword(s):  
Emission Spectrum ◽  
Hybrid System ◽  
Low Temperatures ◽  
Room Temperature ◽  
Light Emission ◽  
Large Temperature ◽  
Two Dimensional ◽  
Temperature Range ◽  
Organic Hybrid

We report broadband light emission (~350-800 nm) properties of two-dimensional layered (C12H25NH3)2MnCl4 inorganic-organic hybrid system in a large temperature range of ~5-400 K. At room temperature, the emission spectrum weighs...

THE VARIATION OF THE VISCOSITY OF GASES WITH TEMPERATURE OVER A LARGE TEMPERATURE RANGE

1935 ◽  
Vol 13b (3) ◽  
pp. 140-148 ◽  
Author(s):  
A. B. Van Cleave ◽  
O. Maass
Keyword(s):  
Carbon Dioxide ◽  
High Temperatures ◽  
Methyl Ether ◽  
Sulphur Dioxide ◽  
Low Temperatures ◽  
Room Temperature ◽  
Empirical Equation ◽  
Large Temperature ◽  
Temperature Range ◽  
Inversion Temperature

The coefficients of viscosity of ammonia, propylene, ethylene and methyl ether, over the temperature range 23 to −80 °C., have been measured. A comparison is made between the present data and those of other authors for temperatures above 0 °C. It is estimated that the authors' results are correct to 0.2% and have a relative accuracy of 0.1%. It is claimed that they are the most accurate data for the viscosity of gases at low temperatures to date.The validity of a number of viscosity–temperature relations has been tested with the present data and those previously published (18, 20). In general, it is found that the equations of Sutherland and Jones hold at high temperatures but fail at low temperatures for substances such as carbon dioxide, sulphur dioxide, ammonia, methyl ether and propylene, which have viscosity–temperature curves that are convex to the temperature axis below room temperature. An empirical equation is suggested which adequately represents the variation of viscosity with temperature for these five gases over the temperature range 23 to −80 °C. However, this relation fails at high temperatures for all gases, and even at low temperatures for substances such as hydrogen, air and ethylene.It is pointed out that the viscosity–temperature curves for carbon dioxide, sulphur dioxide, ammonia, methyl ether and propylene each show a definite inversion or inflexion point. Below this inversion temperature the viscosity curves are convex to the temperature axis; above it they are concave to the temperature axis. In general, it seems that this inversion temperature bears a direct relation to the polarity of the molecule and to the critical temperature.

Notizen: Various Donors in n-ZnSb and the Influence of Sample Treatment

1975 ◽  
Vol 30 (3) ◽  
pp. 381-382 ◽  
Author(s):  
A. Abou- Zeid ◽  
G. Schneider
Keyword(s):  
Low Temperatures ◽  
Room Temperature ◽  
Surface Effects ◽  
Sample Treatment ◽  
Temperature Range ◽  
Donor Doping ◽  
P Type

Various donor doping of ZnSb is investigated. Te-doping yields the most stable n-type crystals at room temperature; the samples show p-type behaviour at low temperatures. The influence of surface effects is demonstrated. It was possible to prepare n-type ZnSb for the whole temperature range.

scholarly journals The principal magnetic susceptibilities of some paramagnetic crystals at low temperatures

1933 ◽  
Vol 140 (842) ◽  
pp. 695-713 ◽  
Keyword(s):  
Ammonium Sulphate ◽  
Low Temperatures ◽  
Room Temperature ◽  
Manganese Carbonate ◽  
Small Range ◽  
Restricted Range ◽  
Nickel Sulphate ◽  
Temperature Range ◽  
Naturally Occurring ◽  
Ferrous Carbonate

Our knowledge of the temperature variation of the principal susceptibilities of paramagnetic crystals is as yet fragmentary. The principal susceptibilities of a number of paramagnetic crystals have been determined by Finke and by Rabi at room temperature but the first measurements on orientated crystals over any range of temperature were those of Foëx. He has published the principal susceptibilities of siderose (a mineral which is mainly ferrous carbonate but which contains appreciable quantities of the carbonates of manganese and other metals) over the range 87° to 400°K. and some measurements but not actual principal susceptibilities for manganese sulphate, MnSO 4 .4H 2 O. The writer measured the principal susceptibilities of cobalt ammonium sulphate and nickel sulphate, NiSO 4 . 7H 2 O over the temperature range 14°-290°K. and the writer and de Haas have published measurements on manganese ammonium sulphate crystals over the restricted range 14°-20° K. In addition Dupouy has repeated Foëx’s observations on siderose and has measured the principal susceptibilities of dialogite (a naturally occurring manganese carbonate) and oligist (Fe 2 O 3 ), all over a small range of temperature above 0° C. Quite recently Bartlett has employed Rabi’s method to determine the principal susceptibilities of the following compounds, CoSO 4 . 7H 2 O, CoSO 4 . (NH 4 ) 2 SO 4 . 6H 2 O, CoSO 4 . K 2 SO 4 . 6H 2 O, CuSO 4 . (NH 4 ) 2 SO 4 . 6H 2 O CuSO 4 . K 2 SO 4 . 6H 2 O, NiSO 4 . (NH 4 ) 2 SO 4 . 6H 2 O over the temperature range —45° to +55°C. In the writer’s opinion, however, Bartlett’s procedure is liable to several objections.

scholarly journals A “Pushy” Microscope

1996 ◽  
Vol 4 (2) ◽  
pp. 3-4
Author(s):  
Stephen W. Carmichael
Keyword(s):  
Scanning Tunneling Microscope ◽  
Low Temperatures ◽  
Research Laboratory ◽  
Room Temperature ◽  
Scientific Research ◽  
Thermal Motion ◽  
Scanning Tunneling ◽  
Two Dimensional ◽  
Tunneling Microscope ◽  
Dimensional Surface

The process of ultra-miniaturization has been termed nanofabrication. It looks like the scanning tunneling microscope (STU) and related microscopes will be players in this technology of the future. One of the most recent contributions has been the demonstration that single molecules can be “pushed” across a surface with the STM. This remarkable achievement was demonstrated by Thomas Jung, Reto Schlittler, and James Gimzewski of the IBM Zurich Research Laboratory and Hao Tang and Christian Joachim of the National Center for Scientific Research in Toulouse, They were able to position intact individual molecules on a two-dimensional surface at room temperature by a controlled “pushing” action of the tip of a STM. Similar positioning feats have been done at low temperatures while thermal motion is limited.

Sonochemical Synthesis and Photocurrent of HgTe NANOPARTICLES

2005 ◽  
Vol 277-279 ◽  
pp. 961-965 ◽  
Author(s):  
Hyun Suk Kim ◽  
Kyoungah Cho ◽  
Hyun Woo Song ◽  
Jin Hyoung Kim ◽  
Jun Woo Lee ◽  
...  
Keyword(s):  
Hybrid System ◽  
Room Temperature ◽  
Lattice Structure ◽  
Sonochemical Synthesis ◽  
Mercury Telluride ◽  
Organic Hybrid

We report the sonochemical synthesis of mercury telluride (HgTe) nanoparticles and the photocurrents of these nanoparticles and their organic hybrid system. The HgTe nanoparticles were about 5 nm in size and their lattice structure was cubic. Poly(N-vinylcarbazole)(PVK) was added to the HgTe nanoparticles for the formation of an inorganic(HgTe)-organic(PVK) hybrid system. The room-temperature photocurrents of the HgTe nanoparticles and the HgTe-PVK hybrid system were compared in this study. The photocurrent was significantly enhanced for the HgTe-PVK hybrid system.

scholarly journals A general chemical transformation route to two-dimensional mesoporous metal selenide nanomaterials by acidification of a ZnSe–amine lamellar hybrid at room temperature

2016 ◽  
Vol 7 (7) ◽  
pp. 4276-4283 ◽  
Author(s):  
Zeng-Wen Hu ◽  
Liang Xu ◽  
Yuan Yang ◽  
Hong-Bin Yao ◽  
Hong-Wu Zhu ◽  
...  
Keyword(s):  
Chemical Transformation ◽  
Room Temperature ◽  
Two Dimensional ◽  
Organic Hybrid ◽  
General Chemical ◽  
Mesoporous Metal ◽  
Metal Selenides

A family of mesoporous nanosheets of metal selenides can be synthesized using an intermediate precursor so-called “red Se remaining Zn” (RSRZ), which is generated by acidification of inorganic–organic hybrid ZnSe(DETA)0.5 nanosheets.

Fast kinetics of Mg2+/Li+ hybrid ions in a polyanion Li3V2(PO4)3 cathode in a wide temperature range

2019 ◽  
Vol 7 (16) ◽  
pp. 9968-9976 ◽  
Author(s):  
Muhammad Rashad ◽  
Hongzhang Zhang ◽  
Xianfeng Li ◽  
Huamin Zhang
Keyword(s):  
Wide Temperature Range ◽  
Low Temperatures ◽  
Room Temperature ◽  
Excellent Performance ◽  
Fast Kinetics ◽  
Temperature Range ◽  
Kinetics Of

A Li3V2(PO4)3 based Mg2+/Li+ hybrid battery with excellent performance both at room temperature and low temperatures (0, −10, −20, −30, and −40 °C) is presented.

Tunable broad-band white light emission in the two-dimensional (110)-oriented lead bromide perovskite (C3H8N6)[PbBr4]: Structural characterization, Optical and Luminescence properties.

2021 ◽  
Author(s):  
Rawia Msalmi ◽  
Slim Elleuch ◽  
Besma Hamdi ◽  
Eros Radicchi ◽  
Anowar Tozri ◽  
...  
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Room Temperature ◽  
Light Emission ◽  
Broad Band ◽  
Organic Cations ◽  
Triplet States ◽  
Two Dimensional ◽  
Room Temperature Phosphorescence ◽  
Lead Bromide

Newly, room temperature phosphorescence (RTP) in 2D hybrid perovskites has been proved due to the energy transfer from inorganic sheets to the conjugated organic cations harnessing the triplet states. So...

scholarly journals The diffusion of hydrogen through copper

1936 ◽  
Vol 153 (880) ◽  
pp. 504-512 ◽  
Keyword(s):  
High Temperatures ◽  
Low Temperatures ◽  
Large Temperature ◽  
Temperature Range ◽  
Copper Solution ◽  
Diffusion Of Hydrogen

At temperatures higher than about 400°C, several observers have determined the rates of diffusion of hydrogen through copper, and only recently has a paper by Smithells and Ransley appeared, giving measurements on diffusion as low as 225°C. Sieverts, Deming and Hendricks, and Lombard have shown that the copper tubes and plates used in the experiments at high temperatures tend to crystallize and become fissured, so that the measurements are of little value. The adsorption of hydrogen by copper has been thoroughly studied over a large temperature range. Ward has shown that, at low temperatures, the immediate initial adsorption is followed by a slow solution of the hydrogen in the copper. Solution increases very rapidly with temperature, and above 160°C is so large and so rapid that the initial adsorption cannot be accurately determined.

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