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SUMMARY:Versatile and scalable approaches to chemical processing of nanoca
 rbons
DTSTART:20190520T131500
DTEND:20190520T141500
DTSTAMP:20261002T035449Z
UID:f527c0407d500b23bd84bf64a9897077b32d2264b955ee1bff550e75
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Milo Shaffer\, Department of Chemistry\, Imperial Colleg
 e London\nIndividual perfect nanocarbon structures have exceptional proper
 ties\; the challenge is often how to exploit their potential in real macro
 scopic systems. Chemical functionalisation is critical to a wide range of 
 nanocarbon technologies\, but needs to be versatile and applicable at scal
 e. Existing approaches tend to rely on liquid phase reactions\, often requ
 iring damaging sonication or lengthy work up through filtration or centrif
 ugation. The formation of individualized functionalised single wall nanotu
 bes (SWNTs) and graphenes is a particular challenge.\nOne approach is to s
 hift the modification reaction into the gas phase. We have developed a ge
 neric\, scalable furnace treatment\, based on the thermochemical activatio
 n of CNTs\, followed by reaction with functional organic monomers. This ap
 proach allows the introduction of a wide variety of functional groups onto
  the CNT surface whilst maintaining the excellent properties of the untrea
 ted materials. The reaction is extremely versatile and can be carried out 
 with a variety of monomers and carbon-based materials\, and follows an unu
 sual radical-based mechanism. \nA different approach to nanotube processi
 ng\, relies on reductive charging to form pure nanotubides (nanotube anion
 s) which can be redissolved\, purified\, or optionally functionalised\, wh
 ist avoiding the damage typically associated with sonication and oxidation
  based processing. This simple system is effective for a host of nanocarbo
 n materials including MWCNTs\, ultralong SWCNTs\, carbon blacks\, and grap
 henes. The resulting nanocarbon ions can be readily chemically grafted for
  a variety of applications. Dispersed nanocarbon related materials can be
  assembled\, by electrophoresis\, cryogel formation\, or direct cross-link
 ing to form Joule heatable networks\, protein nucleants\, supercapacitor e
 lectrodes\, and catalyst supports\, particularly suited to combination wit
 h other 2d materials\, such as layered double hydroxides. Comparative stu
 dies allow the response of nanocarbons with different dimensionalities to 
 be assessed to identify fundamental trends and the most appropriate form f
 or specific situations.   Charged Carbon Nanomaterials: Redox Chemistries
  of Fullerenes\, Carbon Nanotubes\, and Graphenes\, CHEMICAL REVIEWS\, Vo
 l: 118\, Pages: 7363-7408\, 2018   Fast Exfoliation and Functionalisatio
 n of Two-Dimensional Crystalline Carbon Nitride by Framework Charging\, A
 NGEWANDTE CHEMIE-INTERNATIONAL EDITION\, Vol: 57\, Pages: 12656-12660\, 2
 018   Thermochemical functionalisation of graphenes with minimal framewor
 k damage\, CHEMICAL SCIENCE\, Vol: 8\, Pages: 6149-6154\, 2017\nBio: Mil
 o Shaffer is Professor of Materials Chemistry at Imperial College London\,
  and co-Director of the London Centre for Nanotechnology. He has extensive
  experience of carbon and inorganic nanomaterials synthesis\, modification
 \, characterization\, and application\, particularly for nanocomposite and
  hierarchical systems. Key applications are structural composites\, electr
 ochemical electrodes\, and functional thin films. MS completed his PhD and
  a Research Fellowship at the University of Cambridge\, and has previously
  worked as a materials technology consultant in the areas of new technolog
 y development and exploitation\, and has filed around 30 patents/applicati
 ons\, eight of which have been licensed commercially. He has published wel
 l nearly 200 peer-reviewed papers with a total of over 15\,000 citations\,
  h-Index 57. He was awarded the Royal Society of Chemistry (RSC) Meldola m
 edal in 2005\, a prestigious EPSRC Leadership Fellowship in 2008\, and RSC
  Corday-Morgan medal in 2014. He sits editorial boards of Nanocomposites &
  International Materials Reviews\, and has helped to organise a number of 
 international nano-related meetings\, including several of the Nanotube se
 ries\, CNP-COMP\, and a Faraday Discussion on Advanced Carbon.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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