Thermoelectric Properties of Fe0.2Co3.8Sb12-xTex ... - Physics
Thermoelectric Properties of Fe0.2Co3.8Sb12-xTex ... - Physics Thermoelectric Properties of Fe0.2Co3.8Sb12-xTex ... - Physics
Investigating DNA hybridization through changes in conductance of ultrathin Au nanowires Nidhi Lal 1 , Avradip Pradhan 2 , Arindam Ghosh 2 and N. Ravishankar 1 1 Materials Research Centre, Indian Institute of Science, Bangalore 560012, India 2 Department of Physics, Indian Institute of Science, Bangalore 560012, India DNA hybridization is a biological process which is unique in being extremely specific where nucleotides in one strand bind to their counterpart in the other strand via hydrogen bonds. DNA molecules also carry negative charge and thus have the potential to change the conductivity of various nanostructures when bound to them. We have used the very same property of these molecules to identify the process of DNA hybridization by changing the conductivity of ultrathin Au nanowires. Label free electrical detection of DNA hybridization has been studied using various nanostructures (CNTs, silicon nanowires and graphene, for instance). In the present study, single stranded DNA (ssDNA) molecules were immobilized over Au nanowires. The immobilization was confirmed by AFM characterization done on ssDNA attached to Au nanowires. Upon addition of target molecules, a significant change in the conductance of Au nanowires was observed. These measurements were carried out by two probe resistance method done at room temperature.
Quantum Simulation of Dzyaloshinsky-Moriya Interaction V. S. Manu and Anil Kumar Centre for Quantum Information and Quantum Computing, Department of Physics and NMR Research Centre, Indian Institute of Science, Bangalore-560012 Quantum simulation of a Hamiltonian H requires unitary operator decomposition (UOD) of its evolution operator, (U = exp(−iHt) ) in terms of experimentally preferable unitaries. Here, using Genetic Algorithm optimization, we numerically evaluate the most generic UOD for the Hamiltonian, DM interaction in the presence of Heisenberg XY interaction, H DH . Using these decompositions, we studied the entanglement dynamics of Bell state in the Hamiltonian H DH and verified the entanglement preservation procedure by Hou et al.[1]. References: 1. Y.C. Hou, G.F. Zhang, Y. Chen, and H. Fan. Preservation of entanglement in a two-qubit-spin coupled system. Annals of Physics, 327:292296, 2012.
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Investigating DNA hybridization through changes in<br />
conductance <strong>of</strong> ultrathin Au nanowires<br />
Nidhi Lal 1 , Avradip Pradhan 2 , Arindam Ghosh 2 and N. Ravishankar 1<br />
1 Materials Research Centre, Indian Institute <strong>of</strong> Science, Bangalore 560012, India<br />
2 Department <strong>of</strong> <strong>Physics</strong>, Indian Institute <strong>of</strong> Science, Bangalore 560012, India<br />
DNA hybridization is a biological process which is unique in being extremely specific<br />
where nucleotides in one strand bind to their counterpart in the other strand via<br />
hydrogen bonds. DNA molecules also carry negative charge and thus have the potential<br />
to change the conductivity <strong>of</strong> various nanostructures when bound to them. We have<br />
used the very same property <strong>of</strong> these molecules to identify the process <strong>of</strong> DNA<br />
hybridization by changing the conductivity <strong>of</strong> ultrathin Au nanowires. Label free electrical<br />
detection <strong>of</strong> DNA hybridization has been studied using various nanostructures (CNTs,<br />
silicon nanowires and graphene, for instance). In the present study, single stranded<br />
DNA (ssDNA) molecules were immobilized over Au nanowires. The immobilization was<br />
confirmed by AFM characterization done on ssDNA attached to Au nanowires. Upon<br />
addition <strong>of</strong> target molecules, a significant change in the conductance <strong>of</strong> Au nanowires<br />
was observed. These measurements were carried out by two probe resistance method<br />
done at room temperature.
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