Accessibility Skip to Global Navigation Skip to Local Navigation Skip to Content Skip to Search Skip to Site Map Menu

Electron microscopy team

The staff will help you with your electron microscopy (EM) experiments and train you to use the equipment. You are not expected to master every function of the instruments and can ask for help at any time, whether it be in using the equipment or the design of your experiment.

It's never too early to seek advice. Even if your project is months away from using the microscopy facility it's good to be aware of any potential pitfalls early on.

You may also choose to contract the labour content of your project to the staff. If so, please contact Allan Mitchell in the first instance to discuss options.

Electron microscopy staff

Allan Mitchell, Technical Manager

Allan Mitchell thumbnailAllan manages the electron microscope side of things and is your first point of contact for a new EM project.

Tel +64 3 479 5642

^ Top of page

Dr Mihnea Bostina

Mihnea Bostina thumbnailMihnea is the Academic Director of OMNI Electron Microscopy and a senior lecturer in Microbiology. His research interest is the structural biology of viruses and single particle reconstruction.

Tel +64 3 479 7301

^ Top of page

Richard Easingwood

Richard Easingwood thumbnailRichard has expertise in Transmission Electron Microscopy (TEM) including:

  • Small particle analysis (viruses, nanoparticles, etc)
  • Cryo-substitution
  • Freeze-fracture
  • Chemical fixation
  • Embedding and ultramicrotomy
  • Image analysis and image editing

Tel +64 3 479 7301

^ Top of page

Liz Girvan

Liz Girvan thumbnailLiz's expertise is in Scanning Electron Microscopy (SEM) including:

  • Conventional SEM sample preparation and imaging
  • Field emission SEM sample preparation and imaging
  • Cryo - FESEM
  • Energy dispersive x-ray analysis (EDS)

Tel +64 3 479 7386

^ Top of page

Gillian Grayston

Gillian Grayston thumbnailGillian's expertise in Electron Microscopy includes:

  • Conventional TEM sample preparation
  • Ultramicrotomy
  • Cryo-ultramicrotomy
  • Liquid nitrogen management

Tel +64 3 479 7301

^ Top of page

Sharon Lequeux

Sharon Lequeux thumbnailSharon's expertise in Electron Microscopy includes:

  • Correlative microscopy
  • Immunolabeling
  • Ultramicrotomy
  • Cryo-ultramicrotomy
  • High pressure freezing and plunge freezing
  • Conventional TEM and SEM sample preparation and imaging


Sharon is part-time and can be contacted on Mondays, Tuesdays and Wednesdays.

^ Top of page

Marianne Negrini

Marianne Negrini thumbnailMarianne is a technician for the Department of Geology. Her expertise includes:

  • Operation of the Zeiss FEG SEM
  • Aztech software

Tel +64 3 471 6097 (SEM lab)
Tel +64 3 479 7507 (office)

^ Top of page

Maja Tusek (Accounts)

Maja is providing temporary accounts support.

^ Top of page

Confocal and light microscopy, and X-ray µCT

Andrew McNaughton thumbnailAndrew McNaughton manages the OMNI confocal and µCT facility and is the person to approach regarding using these techniques.

His expertise is in Confocal Microscopy and µCT including:

  • Confocal training and techniques
  • µCT training
  • Nano-indenter training
  • Image processing and 3D reconstruction

Visit our confocal microscopy page

^ Top of page

User Group

The User Group consists of members that represent University of Otago departments that use the Electron Microscopy unit and advises the OMNI Academic Advisory Group on direction and strategy.

Visit About us for information about how our user groups work and how to make contact.