I am interested in the application of non-destructive high resolution imaging and analysis techniques to rare and precious materials. By employing a range of in-situ, non-destructive or minimally destructive methods samples can be subject to rigorous analysis but also preserved for future study.
- Analysis of ancient materials
- Application of FIBSEM to precious meteoritical and geological materials
- Milling and extraction methods in the production of TEM wafers using FIBSEM
- 3D sample analysis
- In-situ analysis techniques
- Novel applications of high resolution microscopy
- Pallasites, iron meteorites and evidence of parent body processing
- Classification and study of newly discovered meteorites
A selection of conference and meeting presentations:
1st Sept 2013 Essex Egyptology Group, Meteorites in ancient Egypt, an invited 90 minute lecture.
29th-30th Aug 2012 Palaeopathology in Egypt and Nubia: A Century in Review, Natural History Museum, London, UK, D. Johnson, M.M Grady, T. Lowe and J. Tyldesley, Microstructural analysis of a predynastic iron meteorite bead, lecture.
14th Dec 2011 Society of Electron Microscope Technology, one day meeting, A FIBSEM subsurface glimpse of evolution, invited lecture.
14th Sept 2011 Cultural Herritage meets science: the interface (IOP), Mary Rose Trust, Portsmouth, Johnson D, Grady M M, Lowe T, Tyldesley J, A compositional and structural study of an ancient Egyptian iron meteorite bead, Johnson D, Grady MM, FIBSEM analysis of subsurface structure and chemistry within materials of cultural herritage, poster presentations.
8th-12th Aug 2011 74th Annual Meeting of the Meteoritical Society, Greenwich, UK, Johnson D, Grady MM, Tyldesley J, Gerzeh a prehistoric Egyptian meteorite, lecture.
15th June 2011 MIDSEM users group, University of Birmingham,UK, Applications of FIBSEM to Geology and Archaeology, invited lecture.
9th- 10th Sept 2010 SEM2010, The British Museum, London,UK, Johnson D, Kearns S, Grady MM, Subsurface analysis by application of FIBSEM to samples of geological and historical importance, lecture.
Selection of papers and abstracts:
Johnson D., Tyldesley J., Lowe T, Withers P.J. , Grady.M.M
Analysis of a prehistoric Egyptian iron bead with implications for the use and perception of meteorite iron in ancient Egypt, Meteoritics and Planetary Science, 48, 6, 997-1006 http://onlinelibrary.wiley.com/doi/10.1111/maps.12120/full
Pillinger C.T., Greenwood R.C., Johnson D., Gibson J.M., Tindle A.G., Verchovsky A.B., Buikin A.I., Franchi I.A., Grady M.M. (2013) Light element geochemistry of the Chelyabinsk meteorite. Geokhimiya, 51, 7, 599-608
Johnson D., Tindle A.G. (2013) A Virtual Microscope through time progress report, Infocus magazine, the proceedings of the Royal Microscopical Society, 30, 60-66.
Johnson D., Kearns S.L., Grady M. M. (2012). Subsurface analysis by application of FIB-SEM to samples of geological and historical importance. In: Meeks, Nigel; Cartwright, Caroline; Meek, Andrew and Mongiatti, Aude eds. Historical Technology, Materials and Conservation: SEM and Microanalysis. London: Archetype Publications, 56–61.
Johnson D,; Grady.M.M.; Tyldesley J. (2011). Gerzeh, a prehistoric Egyptian meteorite. 74th Annual Meeting of the Meteoritical Society, 8-12th Aug 2011, London, UK.
Pillinger CT, Pillinger JM, Greenwood RC, Johnson D, Tindle AJ, Jull TAJ, Allen DWH, The Danebury Iron age meteorite,Gerzeh, a prehistoric Egyptian meteorite. 74th Annual Meeting of the Meteoritical Society, 8-12th Aug 2011, London, UK.
Needham AW, Starkey NA, Johnson D, Tomkinson T, Guillermier C, Abel D, Franchi IA, Grady MM, Origin and composition of carbonates, sulphates and halite on Mars, 74th Annual Meeting of the Meteoritical Society, 8-12th Aug 2011, London, UK
Johnson, Diane (Dec 2010). SEM2010 Report, Proceedings of the Royal Microscopical Society infocus magazine, Is 20, p74.
Zhang, Fucheng; Kearns, Stuart L.; Orr, Patrick J.; Benton, Michael J.; Zhou, Zhonghe; Johnson, Diane; Xu, Xing and Wang, Xiaolin (2010). Fossilized melanosomes and the colour of Cretaceous dinosaurs and birds. Nature
, 463(7284), p. 1075.
Cockell C.S., Van Calsteren P., Mosselmans J.F.W., Franchi I.A., Gilmour I., Kellt L., Olsson-Francis K., Johnson D. (2010) Microbial endolithic colonization and the geochemical environment in young seafloor basalts, Chemical Geology, 279, 1-2, 17-30.
Greenwood, R. C.; Haack, H.; Buchanan, P. C.; Franchi, I. A.; Smith, C. L.; Johnson, D. and Burbine, T. H. (2009). Searching for the missing mantles of disrupted asteroids: Evidence from an olivine-rich clast in the Vaca Muerta Mesosiderite.
In: 40th Lunar and Planetary Science Conference
, 23-27 March 2009, Houston, Texas.
Anand, M.; James, S.; Greenwood, R. C.; Johnson, D.; Franchi, I. A. and Grady, M. M. (2008). Mineralogy and Geochemistry of Shergottite RBT 04262.
In: 39th Lunar and Planetary Science Conference (Lunar and Planetary Science XXXIX)
, 10-14 March 2008, League City, Texas, USA.
Johnson, D.; Hutchison R.; Grady, M.M. (2007). Implications of sulphide distributions in the main group pallasites. In 70th Annual Meeting of the Meteoritical Society 2007, 13 Aug - 17 Aug 2007, Tucson, Arizona, USA.
Davidson, J.; Genge, M. J.; Mills, A. A.; Johnson, D. and Grady, M. (2007). Ancient Cosmic Dust from Triassic Halite.
In: 38th Lunar and Planetary Science Conference
, 12-16 March 2007, Houston, Texas, USA.
Greenwood, R. C.; Pearson, V. K.; Verchovsky, A. B.; Johnson, D.; Franchi, I. A.; Roaldset, E.; Raade, G. and Bartoschewitz, R. (2007). The Moss (CO3) meteorite: an integrated isotopic, organic and mineralogical study.
In: 38th Lunar and Planetary Science Conference (Lunar and Planetary Science XXXVIII)
, 12-16 March 2007, Houston, Texas.
Media interest in my research: