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SUMMARY:Tailoring two-dimensional materials for wearable electronics and b
 io-engineering applications - Dr Felice Torrisi\, Cambridge Graphene Centr
 e
DTSTART:20181026T130000Z
DTEND:20181026T140000Z
UID:TALK109510@talks.cam.ac.uk
CONTACT:Hilde Hambro
DESCRIPTION:Graphene and related 2D materials (GRMs) hold a great potentia
 l for wearable electronics and bio-engineering thanks to their electrical\
 , optical and mechanical properties together with biocompatibility and env
 ironmental stability\, ideal for tissue engineering\, drug delivery and el
 ectronic skins. [1]. The production and deposition of thin films of GRM (f
 ig.1a) from solutions or inks is extremely attractive for printed electron
 ic devices\, viable for stretchable and textile electronics. [2] GRM-based
  inks enable a large range of printed device and integration options\, suc
 h as digital\, lithographic printing and roll-to-roll coating\, which are 
 ideal to deposit patterned thin films. The exfoliation in liquid of layere
 d bulk materials (such as graphite\, MoS2 crystals\, etc.) is a scalable a
 pproach ideal to produce inks. However\, currently the low yield of this p
 rocess\, results in a low concentration of dispersed GRMs. I will give a b
 rief overview on the development of high-yield production GRM-based soluti
 ons and inks\, suitable for several priting processes enabling GRM-based p
 rintable and flexible (opto)electronic devices. [3]. Then I will show how 
 careful tuning of the surface interaction and GRM deposition process enabl
 es wearable and stretchable electronic devices (fig.1b) such as Thin Film 
 Transistors achieving electron mobility > 100 cm2 V-1 s-1 at room temperat
 ure. [4] I will demonstrate how the combination of electro-mechanical prop
 erties and biocompatibility of graphene thin films [5] make them suitable 
 as neuron-interfacing electrodes\, (fig.1c) enhancing the neuronal activit
 y. This paves the way to the fabrication of flexible graphene-based device
 s on plastics or textiles for medical applications\, (fig.1d) such as bios
 ensors and neuroprosthetics\, whereby graphene electrodes interact efficie
 ntly with the cells without altering the cells behaviour [6]. GRM inks can
  also be assembled in the form of hydrogels or foams using pre-existing te
 mplates and extending the above-mentioned properties to three-dimensional 
 structures. I will show recent result on engineered GRM scaffolds bio-mimi
 cking extracellular matrix for artificial tissue engineering with fibrobla
 st cells.[7] Finally\, I will show future research directions towards fibr
 e-based electronics for spinal cord repair and controlled tissue re-growth
 . \n[1]	Z. Sun et al. ACS Nano 4\, 2\, 803\, (2010)\n[2]	F. Torrisi et al.
  ACS Nano\, 6\, 4\, 2992 (2012)\n[3]	F. Torrisi & J. N. Coleman  Nature Na
 notechnol. 9\, 10 738\, (2014)\n[4]	T. Carey at al. Nature Commun.\, DOI :
  10.1038/s41467-017-01210-2\, (2017)\n[5]	J. Ren et al. Carbon 111\, 622 (
 2017)\n[6]	F. Fabbro et al. ACS Nano 10\, 615\, (2016)\n[7]	M. Talee et al
 . ACS Nano\, submitted (2018)
LOCATION:Oatley Seminar Room\, Department of Engineering
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