Comparison of radiation detector performance for different metal contacts on CdZnTe deposited by electroless deposition method

2011 ◽  
Vol 46 (11) ◽  
pp. 1131-1136 ◽  
Author(s):  
Q. Zheng ◽  
F. Dierre ◽  
M. Ayoub ◽  
J. Crocco ◽  
H. Bensalah ◽  
...  
Keyword(s):  
Electroless Deposition ◽  
Radiation Detector ◽  
Deposition Method ◽  
Metal Contacts ◽  
Detector Performance

Nanoscale Assembly of Nanowires Templated by Microtubules

2005 ◽  
Vol 901 ◽  
Author(s):  
Jing Zhou ◽  
Tzy-Jiun Mark Luo ◽  
Yan Gao ◽  
Mei Xue ◽  
Joseph Lau ◽  
...  
Keyword(s):  
Electroless Deposition ◽  
Ion Beam ◽  
Metal Contacts ◽  
Electrical Measurements ◽  
Inorganic Particles ◽  
Coated Substrate ◽  
Substrate Surfaces ◽  
Focus Ion Beam ◽  
2D And 3D ◽  
Au Colloids

AbstractConventional top-down lithographic processes approach their practical and theoretical limits at dimensional scales less than 100 nm. Alternative bottom-up methods are being investigated to build nanoscale architectures, including the use of biomolecules whose functional groups bind inorganic particles. In this study, the fabrication and alignment of microtubule-based nanowires are investigated. Microtubules (MT) are fibrous proteins found in nearly all eukaryotes. Our work was carried out using polymerized alpha- and beta-tubulins, which were cross-linked with glutaraldehyde to stabilize the protein structure. Ni coated microtubules were fabricated by reducing Ni2+ to Ni0 on Pd activated microtubule surface. Focus Ion Beam was used to write metal contacts on these Ni microtubule nanowires and DC conductivity values were measured. Au deposition on MT was performed by both electroless deposition and electrodeposition, by reducing HAuCl4 onto MT prebound with 2 nm Au colloids. Although most MTs exhibited discontinuous Au binding, a fraction of MTs were covered completely by Au. Preliminary electrical measurements for these materials are reported. Alignment of microtubules was also achieved by injecting MTs into microfluidic devices over amine-coated substrate surfaces. These biotemplating approaches are the first steps towards constructing more complicated 2D and 3D architectures.

Characteristics of metal-semiconductor contacts fabricated by the electroless deposition method

1980 ◽  
Vol 23 (8) ◽  
pp. 905-907 ◽  
Author(s):  
A.K. Datta ◽  
K. Ghosh ◽  
N.K.D. Chowdhury ◽  
A.N. Daw
Keyword(s):  
Electroless Deposition ◽  
Deposition Method ◽  
Semiconductor Contacts

Preparation of Epoxy Resin Thin Film by Electroless Deposition Method

2011 ◽  
Vol 131 (11) ◽  
pp. 1843-1847
Author(s):  
Hitoshi Fukui ◽  
Makoto Hirai ◽  
Tsutomu Shinagawa ◽  
Yasuyuki Kobayashi ◽  
Masaya Chigane ◽  
...  
Keyword(s):  
Thin Film ◽  
Epoxy Resin ◽  
Electroless Deposition ◽  
Deposition Method

X-ray Topography to Characterize Surface Damage on CdZnTe Crystals

2007 ◽  
Vol 1038 ◽  
Author(s):  
David Black ◽  
Joseph Woicik ◽  
Martine C. Duff ◽  
Douglas B. Hunter ◽  
Arnold Burger ◽  
...  
Keyword(s):  
Room Temperature ◽  
Radiation Detector ◽  
Surface Damage ◽  
Polished Surface ◽  
Secondary Phases ◽  
Detector Performance ◽  
Γ Radiation ◽  
X Ray ◽  
Temperature Detection ◽  
Synchrotron Radiation Techniques

AbstractSynthetic CdZnTe or “CZT” crystals can be used for room temperature detection of α- and γ-radiation. Structural/morphological heterogeneities within CZT, such as twinning, secondary phases (often referred to as inclusions or precipitates), and polycrystallinity can affect detector performance. As part of a broader study using synchrotron radiation techniques to correlate detector performance to microstructure, x-ray topography (XRT) has been used to characterize CZT crystals. We have found that CZT crystals almost always have a variety of residual surface damage, which interferes with our ability to observe the underlying microstructure −for purposes of crystal quality evaluation. Specific structures are identifiable as resulting from fabrication processes and from handling and shipping of sample crystals. Etching was found to remove this damage; however, our studies have shown that the radiation detector performance of the etched surfaces was inferior to the as-polished surface due to higher surface currents which result in more peak tailing and less energy resolution. We have not fully investigated the effects of the various types of inducible damage on radiation detector performance.

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