Dr David Alexander Gregory
PhD, MSc, BSc, BSc, FHEA
Department of Materials Science and Engineering
Postdoctoral Research Associate
+44 114 222 7562
Full contact details
Department of Materials Science and Engineering
Sir Robert Hadfield Building
David currently works as senior postdoctoral research associate to Professor Ipsita Roy in the department of Material Science and Engineering. Here his work is focused on the production and characterisation of Polyhydroxyalkanoates via bacterial fermentation and the processing of these biopolymers by methods such as 3D printing and solvent casting for biomedical applications.
He is currently employed on Professor Roy’s 3D BIONET grant which involves the development of a 3D cardiac tissue model and includes mathematical modelling in collaboration with the University of Oxford and Imperial College London.
Having completed undergraduate degrees in Physics with Astrophysics and Cosmology at Lancaster University and Biochemistry and Music at Keele University David went on to study a Masters in Bionanotechnology run jointly between the University of Sheffield and Leeds University. He then joined the Department of Chemical and Biological Engineering for his PhD on catalytic micromotors, under the supervision of Dr Ebbens, which he completed in 2016. During this time, he was key in the development of Reactive Inkjet Printing (RIJ) and enzyme powered silk microrockets which gained considerable media interest and resulted in several high-quality publications. Thereafter, he worked as a Postdoctoral Research Associate with Dr Zhao on RIJ of silk materials and also designed, built and developed the software for two different Reactive Inkjet printers.
Additionally, during his undergraduate degrees and whilst waiting for his PhD to start David spent several occasions working in the pharmaceutical industry in various departments including, Chemistry, Enzymology, and Drug formulation development.
David’s work in the fields of micromotors and Reactive Inkjet Printing has attracted media attention and has consequently resulted in him being invited to speak at several international conferences.
- PhD: “Catalytic Micromotors” (2016); Department of Biological and Chemical Engineering, University of Sheffield, England
- MSc in Bionanotechnology (2011); University of Sheffield and Leeds University, England
- BSc (Dual Honours) in Biochemistry and Music (2010); Keele University, England
- BSc (Honours) in Physics with Astrophysics and Cosmology (2007); Lancaster University, England
- Fellow of The Higher Education Academy (FHEA) (2019)
- Research interests
David is interested in Additive manufacturing with particular interests in Reactive Inkjet printing and 3D tissue scaffolds.
He is also interested in self-motile micromotors / active colloids.
- 3D printable self-propelling sensors for the assessment of water quality via surface tension. JCIS Open, 5, 100044-100044.
- Polyhydroxyalkanoates and their advances for biomedical applications. Trends in Molecular Medicine.
- Bacterial cellulose: A smart biomaterial with diverse applications. Materials Science and Engineering R Reports, 145, 100623.
- Cell Guidance on Peptide Micropatterned Silk Fibroin Scaffolds. Journal of Colloid and Interface Science.
- Mussel inspired chemistry and bacteria derived polymers for oral mucosal adhesion and drug delivery. Frontiers in Bioengineering and Biotechnology, 9. View this article in WRRO
- Silk Fibroin as a Functional Biomaterial for Tissue Engineering.. Int J Mol Sci, 22(3).
- Patterning the neuronal cells via inkjet printing of self-assembled peptides on silk scaffolds. Progress in Natural Science: Materials International.
- Natural biomaterials for cardiac tissue engineering: a highly biocompatible solution. Frontiers in Cardiovascular Medicine, 7. View this article in WRRO
- Reactive inkjet printing and propulsion analysis of silk-based self-propelled micro-stirrers. Journal of Visualized Experiments(146). View this article in WRRO
- Reactive Inkjet Printing of Functional Silk Stirrers for Enhanced Mixing and Sensing. Small, 15(1), 1804213-1804213. View this article in WRRO
- Magnetic-silk/polyethyleneimine core-shell nanoparticles for targeted gene delivery into human breast cancer cells. International Journal of Pharmaceutics, 555, 322-336. View this article in WRRO
- Magnetic alginate/chitosan nanoparticles for targeted delivery of curcumin into human breast cancer cells. Nanomaterials, 8(11). View this article in WRRO
- Catalytic Janus Colloids: Controlling Trajectories of Chemical Microswimmers. Accounts of Chemical Research, 51(9), 1931-1939.
- Symmetrical Catalytically Active Colloids Collectively Induce Convective Flow. Langmuir, 34(14), 4307-4313. View this article in WRRO
- Reactive Inkjet Printing of Biocompatible Enzyme Powered Silk Micro-Rockets. Small, 12(30), 4048-4055. View this article in WRRO
- Effect of Catalyst Distribution on Spherical Bubble Swimmer Trajectories. The Journal of Physical Chemistry C, 119(27), 15339-15348. View this article in WRRO
- Electrokinetic effects in catalytic platinum-insulator Janus swimmers. EPL, 106.
- Rotating ellipsoidal catalytic micro-swimmers via glancing angle evaporation. Materials Advances.
- Polyhydroxyalkanoates, Their Processing and Biomedical Applications, The Handbook of Polyhydroxyalkanoates (pp. 255-284). CRC Press
- CHAPTER 8. Reactive Inkjet Printing of Regenerated Silk Fibroin as a 3D Scaffold for Autonomous Swimming Devices (Micro-rockets), Reactive Inkjet Printing (pp. 169-201). Royal Society of Chemistry
- Soft, Hard, and Hybrid Janus Structures: Synthesis, Self-Assembly, and Applications — Catalytic Janus Swimmers, Soft, Hard, and Hybrid Janus Structures (pp. 315-403). WORLD SCIENTIFIC (EUROPE)
Conference proceedings papers
- View this article in WRRO Altering the Bubble Release of Reactive Inkjet Printed Silk Micro-rockets. International Conference on Digital Printing Technologies, Vol. 2016 (pp 452-456), 12 September 2016 - 12 September 2016.
- View this article in WRRO Regenerated silk fibroin as an inkjet printable biomaterial. International Conference on Digital Printing Technologies, Vol. 2016 (pp 406-409), 12 September 2016 - 16 September 2016.
- Research group
I am currently the senior postdoctoral research associate to Professor Ipsita Roy.
3D BIONET grant: working on the development of Polyhydroxyalkanoates-based 3D Printed tissue repair patches for cardiac tissue applications.
Previous summer project grants and students include:
- Ajay Chandel [SURE project]
- Ella Cliff [SURF project]
- Mobarakshah Assadi [SURF project]
- Teaching activities
- Additive Manufacturing / 3D Printing
- Reactive Inkjet Printing
- Tissue Engineering
- Active colloids / micromotors
- Drug delivery
Currently teaching on:
- BIE103 - Introduction to Bioengineering
- Professional activities
Journal peer reviewer:
- Int. J. Nanotech. & Nanomed. Res.
- ACS Biomaterials Science & Engineering
- 2016 Best poster E-MRS (Symposium: Adv. Materials for Printing) May 2016, Lille (France)
- 2014 PixeLink SDK camera software sponsored by PixeLink®
- 2013 PGR conference Sheffield University First Prize for best Poster
- 2012 Three year PhD EPSRC Stipend at Sheffield University (2012-2015)
- 2011 One year MSc Studentship at Sheffield University (2010-2011)
Much media interest was gained from my Silk Rocket Micromotor paper in Small in 2016: