نتایج جستجو برای: semiconducting germanium

تعداد نتایج: 12211  

1983
M C Payne C J Adkins

Measurements of inelastic electron tunnelling through barriers of amorphous germanium are reported. The data are analysed using a theory of the electron-phonon interaction which includes phonon correlations. The vibrational density of states obtained from the experimental data is in agreement with that expected for amorphous germanium containing a broad distribution of bond angle variations.

Journal: :Chemical communications 2016
Laure Monnereau Thierry Muller Mathias Lang Stefan Bräse

Eight hyper cross-linked polymers based on tetrakis(4-ethynylphenyl)germanium and tetrakis(4-ethynylphenyl)methane are presented. After investigation of their N2 adsorption properties at 77 K, the porosity of the germanium-based porous organic polymers (POPs) was modulated under acidic conditions, offering an easy and direct way, in a single step, to tune the adsorption properties.

2008
F. Cervantes-Sodi G. Csányi A. C. Ferrari

Graphene nanoribbons are the counterpart of carbon nanotubes in graphene-based nanoelectronics. We investigate the electronic properties of chemically modified ribbons by means of density functional theory. We observe that chemical modifications of zigzag ribbons can break the spin degeneracy. This promotes the onset of a semiconducting-metal transition, or of a half-semiconducting state, with ...

Journal: :Nano letters 2009
Lei Ding Alexander Tselev Jinyong Wang Dongning Yuan Haibin Chu Thomas P McNicholas Yan Li Jie Liu

High-density arrays of perfectly aligned single-walled carbon nanotubes (SWNTs) consisting almost exclusively of semiconducting nanotubes were grown on ST-cut single crystal quartz substrates. Raman spectroscopy together with electrical measurements of field effect transistors (FETs) fabricated from the as-grown samples showed that over 95% of the nanotubes in the arrays are semiconducting. The...

2008
A. Sanchez Lorente P. Achenbach A. Botvina M. Kavatsyuk J. Pochodzalla T. R. Saito

For the high resolution spectroscopy of excited hypernuclear states a position sensitive Germanium γ–array [1] [2] has been implemented in the standard PANDA framework PANDAroot. In the simulation encapsulated n–type Germanium crystals are arranged asymmetrically to form a triple cluster [3]. The total γ–array set-up consists of 15 triple Germanium cluster detectors positioned at backward axial...

2000
S. Madhavi V. Venkataraman J. C. Sturm Y. H. Xie

In this paper we report experimental studies carried out on two-dimensional electrons in strained silicon and two-dimensional holes in strained germanium channel modulation doped heterostructures, to understand their lowand high-field transport properties. Hall measurements were done to determine the low-field Ohmic mobility as a function of temperature ~13–300 K!. Geometric magnetoresistance t...

Journal: :Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 2000
dos Santos JM Monteiro Morgado Conde

Non-linearities in the energy response of gas detectors in the regions of the absorption edges of the detection medium are well documented. Monte Carlo calculations show that the non-linearity results from differences in efficiencies for converting absorbed radiation into ionisation for different atomic sub-shells. Energy non-linearity in germanium-based solid-state detectors in the region of t...

2013
M. Wójcik G. Zuzel

Deposition of 226Ra from water on nylon was investigated. Measurements performed for different pH and different radium concentrations in the water gave similar absolute activities deposited on the foil surface. Obtained results were used to estimate the amount of 226Ra plated-out on the nylon scintillator vessel in the solar neutrino experiment BOREXINO during filling of the detector. Another p...

2009
T. Engert M. Krause J. Kunkel K. O. Voss

Germanium-detectors are the most sensitive high-resolution γ detectors available and are the instrument in nuclear structure physics which allows important information about the structure of atomic nuclei to be obtained. The technology of High purity Germanium detectors is presented in [1]. The reported work is motivated by the needs for a new mechanical treatment procedure within the manufactu...

2015
Partha Talukdar Alex Douglas Adam H. Price Gareth J. Norton Roberto Papa

Rice plants accumulate high concentrations of silicon. Silicon has been shown to be involved in plant growth, high yield, and mitigating biotic and abiotic stresses. However, it has been demonstrated that inorganic arsenic is taken up by rice through silicon transporters under anaerobic conditions, thus the ability to efficiently take up silicon may be considered either a positive or a negative...

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