David Alexander Gregory

David Gregory Photo

Dr David Alexander Gregory is currently Lecturer (Assistant Professor) in the Department of Chemical and Biological Engineering at the University of Sheffield.

CTO for our spin off initiative PHAsT

Dr David Alexander Gregory previously worked as a Senior-PDRA to Prof Ipsita Roy at the University of Sheffield in the Department of Materials Science & Engineering.


My research is concerned with applied inkjet printing, which contributes to areas as diverse as tissue engineering, printed electronic devices and 3D scaffold printing of e.g. swimming devices for biomedical applications. Inkjet printing is an additive manufacturing technique. I am an enthusiastic researcher, who enjoys research and supervising / mentoring. I particularly aspire to create new projects that combine several different discipline areas.

It is my future vision to develop new versatile biomaterials and the technologies needed to produce these in order to develop better 3D scaffold systems for use in biomedical applications e.g. regenerative tissue engineering as well as biosensing for disease and toxin monitoring. These address key healthcare challenges as well as environmental monitoring, challenges our society urgently needs to address. Another aspect in line with this is that I am very interested to investigate effects of electronic signals and stimulations of cells.

Recent Research News:

To date I have published 27 research publications comprising 22 journal papers, 3 book chapters and 2 refereed conference papers, resulting in over 1000 citations and a h-index of 13.

Journal Guest Editor

  • Special Issue, Title: “Biomaterials from Nature”, Journal of Functional Biomaterials, IF 4.9.
  • Special Issue, Title: “3D Printing Polymer: Processing and Fabrication”, Polymers, IF 4.96.

Journal Reviewer

  • Advanced Materials, Advanced Materials Interfaces, Langmuir; Int. J. Nanotech. & Nanomed. Res.; ACS Biomaterials Science & Engineering; MDPI;

Recent publications:

I am very excited to announce the publication of our paper of Reactive Inkjet Printing (RIJ) of MOFs. Do check out our work, where we successfully printed gradients.

Reactive Inkjet printing of Metal Organic Frameworks for sensing applications, Advanced Materials Interfaces, pp. 2300027,2023 (DOI)

Another recent publication which I would like to share is our paper on FDM of PHAs for biomedical devices. In this paper we investigate a vast array of biomedical applications and generate proof of concept data for these. We also look into the slicing of models and how this affects printing for biomedical devices due to the nature of the currently available slicing software and suggest work around way to produce best structures.

“Additive Manufacturing of Polyhydroxyalkanoate-based blends using Fused Deposition Modelling for the development of biomedical devices”, Journal of Funct. Biomaterials, 14 (1), 40, 2023 (DOI), (Awarded Editor’s Choice)

Check out our recent publication on Bacterial Cellulose: discussing its vast applications! 2021

Download and read here! DOI

Sustainable production of Polyhydroxyalkanoates (PHAs) via bacterial fermentation


Professional and External Standing

Grant awards

March 2023IAA (UKRI)Production of Polyhydroxyalkanoates for Biomedical applications: Biocompatible, resorbable and sustainable Biomaterials (PoC: Downstream Optimisation and Upstream Scale-up)£48.000
March 2023EPSRCMussel Inspired Chemistry and Bacteria-synthesized Polymers for a Smart Adhesive Drug Eluting Oral Mucosal Patch (EP/X026108/1)£550.000
March 2023SURFReactive Inkjet Printed Silk Stirrers for Rapid Medical Diagnosis 2x £1850
Jan 2023Diamond Light Source (Oxford)X-ray tomography for 3D bioprinting (MG33034)Coherence (6 shifts) estimated value 50 k
Sep 2022Diamond Light Source (Oxford)Ptycho-tomography for composite 3D printing for Tissue Engineering (MG31646)Coherence (12 shifts)
estimated value 100k
July 2022BBSRCBBSRC Lean Launch Programme (£2500 plus £1200 for profession consultancy)£3700
April 2019SUREInvestigating the collective motion of catalytically active micromotors in 3D printed flow cell designs. £2750
May 2019SURFSilk/PEG biogels for reactive inkjet printing and 3D tissue enigneering – for the production of rockets£1850
May 2019SURFSilk/PEG biogels for reactive inkjet printing and 3D tissue enigneering – for the production of cell culture scaffolds£1850

National and International Conference events organised

May 2022Applikon (Gentinge)
Cellink (Bico)
Event Initiator and OrganiserBioSheffield 2022 (Conference)£2395
March 2023Merck
Event OrganiserBioMAT Sheffield 2023 (Micro-symposium)£500


  • 2023       Award via “the Deal”, for going above and beyond to provide both project specific guidance and general student personal development. (UoS)
  • 2022       Award via “the Deal”, for stepping in at short notice when a colleague left at short notice in the New Year. “Your flexibility, professionalism, and collegiality are very much appreciated” (£200)
  • 2021       Award for outstanding postdoc via the Deal (£50) (UoS).
  • 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)

Outstanding postdoc nominations 2021

I would like to thank everybody who nominated me as an outstanding Postdoc in 2021 you can see all the nominations here!

Previous Summer Project Research Group (2019)

Within the Zhao lab I ran a small summer project research group with three dedicated undergraduate students that worked on three projects for me with great results!

Summer Project Students

  • Ajay Chandel [SURE project]
  • Ella Cliff [SURF project]
  • Mobarakshah Assadi [SURF project]

Teaching Certificates and Experience


  • Fellow Higher Education Academy (FHEA) (2019)
  • Associate SuperVisionaries: successful completion of a formally assessed doctoral supervisor development framework (24h total) combining experiential practice, peer-observation, classroom learning, and self-directed reflective study (2019).

Experience and Expertise

  • Module Lead, Chemical and Biological Engineering (CBE), CPE260, Experimental Investigation 2023
  • Module co-lead, CBE Particle Design and Processing, CPE441
  • Delivering Lectures for BIE103 Introduction to Bioengineering
  • Delivering Lectures and writing exam questions for MAT6304
  • Tutorials for BSc and MSc Project-, PhD students and Postdocs.
  • PhD Student Mentoring Program
  • Teaching first year undergraduate Students in practical labs.
  • Supervision and teaching of several master and undergraduate project students
  • Supervision of over 18 PhD students in the Lab as well as support with writing and project planning / experimental design and troubleshooting

Industrial Work Experience

  • 01.12.11 – 31.03.2012 – Abbott Products GmbH, Hans Böckler Allee 20, Hanover, D-30173, Germany: 4 months working in the Department of Enzyme Research: Development of an amylase assay for enzyme determination in various matrices.
  • 20.07.10 – 17.09.2010 – Abbott Products GmbH, Hans Böckler Allee 20, Hanover, D-30173, Germany: 2 months working in the Department of Enzyme Research.
  • 22.06.09 – 21.08.2009 – Solvay Pharmaceuticals, Hans Böckler Allee 20, Hanover, D-30173, Germany: 2 months working in the Department of Enzyme Research.
  • 16.06.08 – 15.08.2008 – Solvay Pharmaceuticals, Hans Böckler Allee 20, Hanover, D-30173, Germany: 2 months in Dept. Med. Chem., synthesis and purification of various compounds.
  • 15.07.06 – 29.09.2006 – Solvay Pharmaceuticals, Hans Böckler Allee 20, Hanover, D-30173, Germany: 2 months in Dept. Drug Formulation Development: A Project to Investigate the water content and sorption properties of Pancreatin.


Piano/organ, composition, photography, astronomy, electronics, 3D cad design and prototyping, breeding and cultivating orchids, passionflowers and water lilies, mineralogy, Chinese and Japanese languages.