BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:PRACTICAL NANOENGINEERING AND THE HYPE OF THE NANOCARBONS - Dr Mat
 thew T. Cole\, CUED
DTSTART:20161215T183000Z
DTEND:20161215T200000Z
UID:TALK67427@talks.cam.ac.uk
CONTACT:Tim Wilkinson
DESCRIPTION:Dr Matthew T. Cole is is a Research Fellow at Cambridge Univer
 sity investigating the heterogeneous integration of chemical vapour deposi
 ted aligned nanomaterials in nanoscale vacuum electronics devices. He is b
 ased in the Electrical Engineering Division of the Department of Engineeri
 ng and is a member of the Centre for Advanced Photonics and Electronics\, 
 the Cambridge Graphene Centre\, and the Electronic Devices & Materials gro
 up.\n\nGraphene and carbon nanotubes have dominated various technology roa
 dmaps of late. Their unique physical properties lend themselves to high ad
 vanced composite and novel electronic systems\, though is the apparent hyp
 e justified? This talk will give a brief introduction to nanotechnology fo
 llowed by an overview of the means and merits of the various growth and is
 olation methods discussed. By way of an example\, the second part of the t
 alk will focus on a single application to assess the functional merits of 
 the nanocarbons\; namely for the realisation of ultra-precision engineered
  near atom scale electron guns. Graphitic nano-carbons out-perform convent
 ional metallic Spindt-like electron emitters across virtually all standard
 ised metrics. Carbon nanotubes (CNT) and graphene offer high-aspect ratios
 \, chemical inertness\, near instantaneous temporal response and low sputt
 er cross-sections\, all of which contribute to their advantageously low tu
 rn-on fields\, negligible hysteresis and high temporal stability. Neverthe
 less\, the efficient use of these emerging nanomaterials in travelling wav
 e tubes\, parallel electron beam lithography systems\, microwave amplifier
 s\, thin film displays and X-ray sources requires the ability to define\, 
 with high fidelity and reproducibility\, sub-micron-scale periodic feature
 s. This presentation will present work on the growth\, characterisation an
 d integration of chemical vapour deposited carbon nanotubes and graphene t
 o form various unique electron sources including\; nanoscale fins\, low-co
 st emitters on catalytically activated metal mesh\, silicon-on-insulator b
 allasted CNT arrays\, high electron transparent graphene triodes\, and the
  first large-area graphene-based electron emission display.
LOCATION:Lecture Theatre 0\, University of Cambridge Engineering Departmen
 t\, Trumpington Street\, Cambridge
END:VEVENT
END:VCALENDAR