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SUMMARY:Elements of a New Molecular Quantum Technology - Tim Albrecht\, Un
 iversity of Birmingham
DTSTART:20190510T150000Z
DTEND:20190510T160000Z
UID:TALK120964@talks.cam.ac.uk
CONTACT:Lorenzo Di Michele
DESCRIPTION:The Molecular Sciences and Chemistry in particular are at a st
 age where the properties of molecular materials and interfaces can be cust
 om-designed to encode new properties and function. This includes precision
  engineering of molecule/electrode interactions in tunnelling junctions\, 
 the exploitation of quantum interference effects for new electronic and th
 ermoelectric materials\, and the application of spin-polarised surfaces to
  affect (electro)chemical reactions. Taken together\, the notion a ‘Mole
 cular’ Quantum Technology is beginning to emerge. In my talk\, I will gi
 ve an overview of our work around this theme with particular focus on two 
 topics\, namely 'sequencing by tunnelling' and single-molecule thermoelect
 rics.\nSequencing-by-tunnelling means that the identity of each base in th
 e DNA strand is determined via its quantum-mechanical tunnelling conductan
 ce\, as a potentially disruptive new way of sequencing DNA\, RNA and other
  biopolymers[1]. While the challenges are significant\, we and others have
  made significant progress towards this goal\, using an interdisciplinary\
 , 'whole system' approach\, including interface design\, nanofabrication [
 2\,3]. advanced data analysis/Deep Learning [4\,5] and electronics [6]\nTh
 e second topic covers some of our work on single-molecule thermoelectrics 
 with particular focus on the thermopower. The latter depends on the slope 
 of the electronic transmission function\, which can in turn be tailored by
  molecular design. I will give examples based on a number of molecular sys
 tems we have studied so far and show how the sign and magnitude of the the
 rmopower can provide detailed insight into the energetics of a single-mole
 cule junction. Briefly\, I will touch upon first steps towards thin-film d
 evices [7].\n\n[1] T. Albrecht\, "Electrochemical Tunnelling Sensors and T
 heir Application"\, Nat. Comm. 2012\, 3\, art. no. 829\; \n[2] AP Ivanov e
 t al.\, "DNA Tunnelling Detector Embedded in a Nanopore"\, Nano Lett. 2011
 \, 11\, 279-285\; \n[3] AP Ivanov et al.\, "High Precision Fabrication and
  Positioning of Nanoelectrodes in a Nanopore"\, ACS Nano 2014\, 8\, 1940-1
 948\; \n[4] M Lemmer et al.\, "Unsupervised Vector-based Classification of
  Single-Molecule Charge Transport Data"\, Nat. Comm. 2016\, 7\, art. no. 1
 2922\; \n[5] T. Albrecht et al.\, "Deep Learning for Single-Molecule Scien
 ce"\, Nanotechnology 2017\, 28\, art. no. 423001 (tutorial)\; \n[6] M Carm
 inati et al.\, "Design and Characterisation of a Current Sensing Platform 
 for Silicon-based Nanopores with Integrated Tunnelling Nanoelectrodes"\, A
 nal. Integr. Circ. Sign. Proc. 2013\, 77\, 333-343\; \n[7] B. Li et al.\, 
 "Cross-plane Conductance through a Graphene/Molecular Monolayer/Au Sandwic
 h"\, Nanoscale 2018\, 10\, 19791-19798.
LOCATION: Small Lecture Theatre\, Cavendish Laboratory\, J.J. Thomson Aven
 ue
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