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Tawfique Hasan

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Tawfique Hasan
Born
Bangladesh
Alma materIslamic University of Technology
University of New South Wales
University of Cambridge
Scientific career
Fields2D materials
Nanowires
Porous materials
Printed electronics
Sensors[1]
InstitutionsUniversity of Cambridge
ThesisCarbon nanomaterials for ultrafast photonics (2009)
Websitewww.nanoengineering.eng.cam.ac.uk Edit this at Wikidata

Tawfique Hasan is a Bangladeshi scientist who is Professor of Nanomaterials at the University of Cambridge.[1][2] He leads the nanoengineering group in the Cambridge graphene centre and serves as deputy head of division B (electrical engineering) in the Department of Engineering, University of Cambridge.[3]

Early life and education

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Hasan was born in Bangladesh. He attended the Islamic University of Technology, where he majored in electronic engineering.[citation needed] After completing his undergraduate degree, Hasan moved to Australia, where he joined the University of New South Wales as a Master's student in microelectronics. His Master of Engineering dissertation investigated CMOS processing.[4] He moved to the University of Cambridge for his PhD, where he worked on carbon nanomaterials for ultrafast photonic devices.[5][6] Hasan was particularly interested in polymer composites, which can be used as saturable absorbers for optical switches and optical amplifier noise suppressors.[6]

Research and career

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Hasan joined King's College, Cambridge as a junior research fellow. He was awarded a Royal Academy of Engineering research fellowship to work on graphene-based processable electronic devices. He is particularly interested in computation-enabled smart devices. He was made a University Lecturer and Title A Fellow at Churchill College, Cambridge in 2013.[7][8]

Whilst at the University of Cambridge, Hasan was a founder of Cambridge Graphene Limited.[9] The company developed a scalable approach to producing graphene-based inks that are aqueous and non-toxic.[9] He is particularly interested in roll-to-roll printing of graphene based electronic devices. He worked with Novalia, a technology company in Cambridge, to print water-based graphene inks at high speed (100 m/min).[10][11] Hasan suspended tiny graphene particles of graphene in a solvent mixture that was incorporated into water-based inks. The graphene-based inks are quick to dry, stick to substrates well, and are waterproof.[10] He demonstrated that it was also possible to print black phosphorus-based inks using the same approach.[12][13]

The coffee ring effect, a phenomenon of fluid mechanics, can have a detrimental impact on printed electronic devices.[14] The effect occurs because liquid evaporates rapidly at the edges of a droplet, causing particles within the droplets to accumulate and an uneven surface to form.[14] Hasan studied the formation of these coffee rings using high-speed photography.[14] He showed that by combining isopropyl alcohol and 2-butanol it was possible to better distribute the ink particles, creating thin films of uniform thickness.[14][15]

In 2019, Hasan developed the world's smallest spectrometers (approx. 100 μm long), that he showed could be used to image onion cells.[16] The spectrometers were made from semiconductor-based nanowires.[17] The composition of the nanowire (semiconductor) is gradually changed from one end of the nanowire to another, which altered the optical properties (and band gaps) along the length of the nanowires.[18][19][20]

Selected publications

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  • F. Bonaccorso; Z. Sun; T. Hasan; A. C. Ferrari (31 August 2010). "Graphene photonics and optoelectronics". Nature Photonics. 4 (9): 611–622. arXiv:1006.4854. doi:10.1038/NPHOTON.2010.186. ISSN 1749-4885. Wikidata Q29041443.
  • Zhipei Sun; Tawfique Hasan; Felice Torrisi; et al. (23 February 2010). "Graphene Mode-Locked Ultrafast Laser". ACS Nano. 4 (2): 803–810. arXiv:0909.0457. doi:10.1021/NN901703E. ISSN 1936-0851. PMID 20099874. Wikidata Q29304077.
  • Felice Torrisi; Tawfique Hasan; Weiping Wu; et al. (26 March 2012). "Inkjet-Printed Graphene Electronics". ACS Nano. 6 (4): 2992–3006. doi:10.1021/NN2044609. ISSN 1936-0851. PMID 22449258. Wikidata Q57424668.

References

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  1. ^ a b Tawfique Hasan publications indexed by Google Scholar Edit this at Wikidata
  2. ^ Tawfique Hasan publications from Europe PubMed Central
  3. ^ www.nanoengineering.eng.cam.ac.uk Edit this at Wikidata
  4. ^ Hasan, Tawfique (2005). A 5V charge pump in a standard 1.8V 0.18um CMOS process. trove.nla.gov.au (ME thesis). University of New South Wales. OCLC 226250915.
  5. ^ Hasan, Tawfique (2009). Carbon nanomaterials for ultrafast photonics. cam.ac.uk (PhD thesis). University of Cambridge. EThOS 603832.
  6. ^ a b Hasan, Tawfique; Sun, Zhipei; Wang, Fengqiu; Bonaccorso, Francesco; Tan, Ping Heng; Rozhin, Aleksey G.; Ferrari, Andrea C. (2009). "Nanotube–Polymer Composites for Ultrafast Photonics". Advanced Materials. 21 (38–39): 3874–3899. doi:10.1002/adma.200901122. ISSN 1521-4095. S2CID 36587931.
  7. ^ Hasan, Dr Tawfique (2013-01-28). "Dr Tawfique Hasan". graphene.cam.ac.uk. Retrieved 2021-11-23.
  8. ^ "People – Churchill College". chu.cam.ac.uk. Retrieved 2021-11-23.
  9. ^ a b "Cambridge Graphene". cambridgegraphene.com. Retrieved 2021-11-23.
  10. ^ a b "New graphene based inks for high-speed manufacturing of printed electronics". cam.ac.uk. University of Cambridge. 2015-10-19. Retrieved 2021-11-23.
  11. ^ Cambridge, University of. "New graphene-based inks for high-speed manufacturing of printed electronics". phys.org. Retrieved 2021-11-23.
  12. ^ Cambridge, University of. "Breakthrough ink discovery could transform the production of new laser and optoelectronic devices". phys.org. Retrieved 2021-11-23.
  13. ^ "Black Phosphorus Ink Compatible with Inkjet Printers Developed". designnews.com. 2017-11-20. Retrieved 2021-11-23.
  14. ^ a b c d "Alcohol beats the coffee ring effect". cosmosmagazine.com. Retrieved 2021-11-23.
  15. ^ Ouellette, Jennifer (2020-08-12). "Adding a dash of alcohol suppresses coffee ring effect in 2D printing inks". arstechnica.com. Retrieved 2021-11-23.
  16. ^ Extance, Andy (2019). "Nanowires become smallest-ever spectrometers". chemistryworld.com. Chemistry World. Retrieved 2021-11-23.
  17. ^ "Chemists build the tiniest spectrometer from a single nanowire". acs.org. Retrieved 2021-11-23.
  18. ^ "Single-nanowires make powerful spectrometers". physicsworld.com. Physics World. 2019-09-24. Retrieved 2021-11-23.
  19. ^ Yang, Zongyin; Albrow-Owen, Tom; Cui, Hanxiao; Alexander-Webber, Jack; Gu, Fuxing; Wang, Xiaomu; Wu, Tien-Chun; Zhuge, Minghua; Williams, Calum; Wang, Pan; Zayats, Anatoly V. (2019). "Single-nanowire spectrometers". Science. 365 (6457): 1017–1020. doi:10.1126/science.aax8814. PMID 31488686. S2CID 201845940.
  20. ^ "Nanowires replace Newton's famous glass prism". techexplorist.com. 2019-09-06. Retrieved 2021-11-23.
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