Current-Voltage Characterization on Au-DNA-Au Junctions under the Influence of Magnetic Field

2012 ◽  
Vol 535-537 ◽  
pp. 1350-1353 ◽  
Author(s):  
Nadia Mahmoudy Khatir ◽  
Seyedeh Maryam Banihashemian ◽  
Vengadesh Periasamy ◽  
Wan Haliza Abd Majid ◽  
Saadah Abdul Rahman
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Silicon Substrate ◽  
Deoxyribonucleic Acid ◽  
Semiconductor Materials ◽  
Future Application ◽  
Current Voltage ◽  
Exponential Decrease ◽  
Dna Strands ◽  
Pcr Method

We utilized Deoxyribonucleic acid (DNA) strands immobilized between a metal gap and its behavior was investigated. The DNA strands were initially prepared using the PCR method while gaps of 10.00 μm lengths were created on gold layer deposited onto silicon substrate. Once immobilized, current-voltage characterization was carried out on the Au-DNA-Au structure fabricated under the presence and absence of magnetic field. Experimental results clearly highlight the behavior of the DNA strands similar to semiconductor materials. An exponential decrease observed in the current in presence of external magnetic field suggests possible future application as a magnetic sensor.

Investigation of the Electrical Resistivity of 20μm-Gap Gold-DNA-Gold Structure: Exploiting the Current-Voltage Characteristics under a Variable External Magnetic Field

2014 ◽  
Vol 554 ◽  
pp. 155-159 ◽  
Author(s):  
Nadia Mahmoudi Khatir ◽  
Zulkurnain Abdul-Malek ◽  
Seyedeh Maryam Banihashemian
Keyword(s):  
Magnetic Field ◽  
Electrical Resistivity ◽  
External Magnetic Field ◽  
Molecular Electronics ◽  
Electronic Devices ◽  
Charge Carriers ◽  
Current Voltage ◽  
Dna Strands ◽  
Pcr Method ◽  
Current Voltage Characteristics

Deoxyribonucleic acid (DNA), as the most important molecule in nature, holds promise as a key element of the molecular electronics as its utilization in the synthesis of electronic devices such as micro and nanosensors has increased remarkably during the recent years. Our work is devoted to an experimental study of the electrical resistivity of a gold-DNA-gold (GDG) structure in the presence of a variable external magnetic field. The DNA strands, extracted by the PCR method, were used to fabricate the GDG structures. The resistivity of the structure was found to rise sharply with the magnitude of the exerted magnetic field due to onset and progression of the cyclotron effects in charge carriers. Such a distinct current-voltage signature can possibly be employed for realization of an accurate magnetic sensor.

SPACE-CHARGE EFFECT IN UNINTENTIONALLY N-DOPED SILICON

2012 ◽  
Vol 26 (08) ◽  
pp. 1250048 ◽  
Author(s):  
KANKAN CONG ◽  
YANG JI
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Space Charge ◽  
Space Charge Effect ◽  
Charge Effect ◽  
Temperature Range ◽  
Ohmic Behavior ◽  
Current Voltage ◽  
Doped Silicon ◽  
High Bias

We report experimental results on current–voltage characteristics of Au-Ti/n-Si/Au-Ti devices made on unintentionally n-doped silicon, which depend dramatically on temperature and external magnetic field. While such devices show Ohmic behavior in the temperature range 154–300 K, space-charge effect dominates at high bias voltages in the temperature range 77–154 K. In the later case, external magnetic field may increase its breakdown voltage, thus inducing large positive magnetoresistance similar to those reported by other groups.

Charge transport spectra in superconductor-InAs/GaSb-superconductor heterostructures

2021 ◽  
Author(s):  
Kuei Sun ◽  
Zhi-qiang Bao ◽  
Wenlong Yu ◽  
Samuel D Hawkins ◽  
John F Klem ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Quantum Well ◽  
Charge Transport ◽  
Gate Voltage ◽  
Differential Resistance ◽  
Charge Carrier Density ◽  
Quasi Particle ◽  
Current Voltage ◽  
Current Voltage Relation

Abstract Charge transport physics in InAs/GaSb bi-layer systems has recently attracted attention for the experimental search for two-dimensional topological superconducting states in solids. Here we report measurement of charge transport spectra of nano devices consisting of an InAs/GaSb quantum well sandwiched by tantalum superconductors. We explore the current-voltage relation as a function of the charge-carrier density in the quantum well controlled by a gate voltage and an external magnetic field. We observe three types of differential resistance peaks, all of which can be effectively tuned by the external magnetic field, and, however, two of which appear at electric currents independent of the gate voltage, indicating a dominant mechanism from the superconductor and the system geometry. By analyzing the spectroscopic features, we nd that the three types of peaks identify Andreev reflections, quasi-particle interference, and superconducting transitions in the device, respectively. Our results provide a basis for further exploration of possible topological superconducting state in the InAs/GaSb system.

scholarly journals Mite Sarcoptes scabiei Varieties Hominis in South Sumatra: Specific Identification and Comparative Study

2020 ◽  
Vol 8 (A) ◽  
pp. 938-942
Author(s):  
Yessi Arisandi ◽  
Chairil Anwar ◽  
Salni Salni ◽  
Dadang Hikmah Purnama ◽  
Novrikasari Novrikasari ◽  
...  
Keyword(s):  
Deoxyribonucleic Acid ◽  
Sarcoptes Scabiei ◽  
Chain Reaction ◽  
Specific Primers ◽  
Specific Identification ◽  
16S Gene ◽  
Dna Strands ◽  
Pcr Method ◽  
Polymerase Chain ◽  
Relationship Of

BACKGROUND: Sarcoptes scabiei mites have more than 15 genetically diverse varieties from various hosts. Identification of S. scabiei mite varieties hominis as an intervention in its prevention is still rarely done. AIM: This study aimed to observe the genetic relationship of the mite S. scabiei varieties hominis compare to the parasite S. scabiei varieties hominis in other regions. METHODS: This research used polymerase chain reaction (PCR) and sequencing methods with 16S gene-specific primers. From 32 S. scabiei samples, 22 samples were identified as varieties hominis that was marked by the appearance of the band at 132 bp. RESULTS: S. scabiei mites hominis varieties from South Sumatra (Yessi Scabies A2 and Yessi Scabies B3) have similarities with deoxyribonucleic acid (DNA) strands with S. scabiei hominis varieties from China (KJ781377 and KJ781376). In contrast, Yessi Scabies A1 has similarities with DNA strands with mite S. scabiei varieties hominis from Australia (AY493402). Still, all the DNA strands, this research is different from S. scabiei mites DNA strands hominis from Panama and Pakistan. CONCLUSION: The PCR method is advantageous and specific in identifying mites S. scabiei hominis varieties, the cause of scabies in humans.

Properties of NdFeB film grown on silicon substrate by PLD under external magnetic field

2005 ◽  
Vol 194 (2-3) ◽  
pp. 372-377 ◽  
Author(s):  
Pan Zheng ◽  
Yousef Haik ◽  
Ching-Jen Chen ◽  
Zhaoning Jiang ◽  
Jim P. Zheng
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Silicon Substrate
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