Research

As a research facility, we take pride and enjoy assisting and supporting your research, and making it happen. We will often make suggestions, plan the work and develop new ways of getting the relevant information out. In this case we hope to take part in writing the paper and co-author the work, but collaboration is optional – and provides no discount. Always reference our paper in your work: http://www.sciencedirect.com/science/article/pii/S0168583X16303433. If you are interested also in what we are doing, see below a description of our own research and below that recent publications.

Du Plessis Research group

See also here: www.sun.ac.za/duplessis

My research group makes use of advanced microCT/nanoCT imaging, advanced 3D image analysis and 3D image-based simulations (eg. structural mechanics, permeability, thermal conductivity, etc). We apply these methods in various research areas and collaborate widely with expert scientists in other fields.

My own research focuses on additive manufacturing, bio-inspiration and biomimetic engineering. This means I make use of microCT and the associated methods above, to visualize, simulate and learn from natural biological systems – then create models using additive manufacturing, to test these designs physically. The full capabilities of the design complexity possible with additive manufacturing are only now starting to be realized; and using natural designs are now feasible for the first time for a number of applications. At the moment I investigate lattice structures for lightweight design and for personal protective materials, as well as for applications in medical implants. Our idea is to learn which designs are best for practical manufacturing by typical powder bed fusion systems, and we aim to demonstrate a bio-inspired new design for protective materials.

I have collaborators in various fields from physics and engineering, all the way to biology, ecology and even geology (yes even rocks can be interesting sometimes). My MSc and PhD students are currently in soil science, mechanical engineering, food science and physics.

Generally I like to collaborate in projects were I can add value to the work, especially using 3D image analysis, simulation or custom imaging experimental design. I have broad interests in non-destructive testing, mechanical engineering / metallurgy, biological structures and simulations, and still some interest in lasers and spectroscopy. However, my weak point is my interest in everything, so hit me with your idea and let’s see how we can do it!

 

I am academically associated with the Physics Department as senior lecturer, and also collaborate with the Department of Mechanical Engineering, Department of Soil science and with Central University of Technology’s Centre for Rapid Prototyping and Manufacturing.

For students: we host MSc and PhD student projects. Currently we have no open positions but we aim to change that soon
For industry: we gladly collaborate and consult on your projects. As independent research group, we can offer a full-process research project service.

Google Scholar Citations profile: https://scholar.google.co.za/citations?user=JlqadDkAAAAJ&hl=en
Researchgate: https://www.researchgate.net/profile/Anton_Du_Plessis3

Publications

2017

Galmed, A.H., du Plessis, A., le Roux, S.G., Hartnick, E., Von Bergmann, H. and Maaza, M., 2018. Three dimensional characterization of laser ablation craters using high resolution X-ray computed tomography. Spectrochimica Acta Part B: Atomic Spectroscopy139, pp.75-82.

Plessis, A.D., Broeckhoven, C. and le Roux, S.G., 2017. Snake fangs: 3D morphological and mechanical analysis by microCT, simulation and physical compression testing. GigaScience.

Du Plessis, Anton; Broeckhoven, Chris; Guelpa, Anina; Le Roux, Stephan Gerhard; Laboratory X-ray micro-computed tomography: a user guideline for biological samples GigaScience 6 6 11-Jan

Broeckhoven, Chris; du Plessis, Anton; Hui, Cang; Functional trade-off between strength and thermal capacity of dermal armor: insights from girdled lizards Journal of the Mechanical Behavior of Biomedical Materials

Grine, Frederick E; Marean, Curtis W; Faith, J Tyler; Black, Wendy; Mongle, Carrie S; Trinkaus, Erik; le Roux, Stephan G; du Plessis, Anton; Further human fossils from the Middle Stone Age deposits of Die Kelders Cave 1, Western Cape Province, South Africa. Journal of human evolution 109 70

du Plessis, Anton; Yadroitsava, Ina; le Roux, Stephan G; Yadroitsev, Igor; Fieres, Johannes; Reinhart, Christof; Rossouw, Pierre; Prediction of mechanical performance of Ti6Al4V cast alloy based on microCT-based load simulation Journal of Alloys and Compounds 724 267-274

Schoeman, Letitia; du Plessis, Anton; Verboven, Pieter; Nicolaï, Bart M; Cantre, Dennis; Manley, Marena; Effect of oven and forced convection continuous tumble (FCCT) roasting on the microstructure and dry milling properties of white maize Innovative Food Science & Emerging Technologies

Broeckhoven, Chris; du Plessis, Anton; Has snake fang evolution lost its bite? New insights from a structural mechanics viewpoint Biology Letters 13 8 20170293

Rozendaal, Abraham; Le Roux, Stephan G; du Plessis, Anton; Application of microCT scanning in the recovery of endo-skarn associated scheelite from the Riviera Deposit, South Africa Minerals Engineering

Yadroitsev, Igov; Krakhmalev, Pavel; Yadroitsava, Inna; Du Plessis, Anton; Qualification of DMLS Ti6Al4V (ELI) alloy for biomedical applications SSF 2017-The 28th Annual International Solid Freeform Fabrication Symposium-An Additive Manufacturing Conference, Austin, Texas, August 7-9, 2017

Dzogbewu, Thywill; Yadroitsev, Igov; Krakhmalev, Pavel; Yadroitsava, Inna; Du Plessis, Anton; Optimal process parameters for in-situ alloyed Ti15Mo structures by Direct Metal Laser Sintering SSF 2017-The 28th Annual International Solid Freeform Fabrication Symposium, Austin, August 7-9, 2017

de Bruyn, Andre; Steenkamp, Christin; Rohwer, Erich G; Du Plessis, Anton; Temperature determination in a supersonic gas jet from self-absorption free excitation spectra of carbon monoxide Frontiers in Optics FM2B. 3

Rozendaal, A; Le Roux, SG; du Plessis, A; Philander, C; Grade and product quality control by microCT scanning of the world class Namakwa Sands Ti-Zr placer deposit West Coast, South Africa: An orientation study Minerals Engineering

Ham, H., du Plessis, A., & le Roux, S. G. (2017). Microcomputer tomography (microCT) as a tool in Pinus tree breeding: pilot studies. New Zealand Journal of Forestry Science, 47(1), 2. https://link.springer.com/article/10.1186/s40490-016-0084-9

Guelpa, A., Marini, F., du Plessis, A., Slabbert, R., & Manley, M. (2017). Verification of authenticity and fraud detection in South African honey using NIR spectroscopy. Food Control, 73, 1388-1396. http://www.sciencedirect.com/science/article/pii/S0956713516306168

2016

Broeckhoven, C., Plessis, A., Roux, S. G., Mouton, P. L. F. N., & Hui, C. (2016). Beauty is more than skin deep: a non‐invasive protocol for in vivo anatomical study using micro‐CT. Methods in Ecology and Evolution. https://www.researchgate.net/profile/Chris_Broeckhoven/publication/308606327_Beauty_is_more_than_skin_deep_A_non-invasive_protocol_for_in_vivo_anatomical_study_using_micro-CT/links/5809ae9c08ae04081348431b/Beauty-is-more-than-skin-deep-A-non-invasive-protocol-for-in-vivo-anatomical-study-using-micro-CT.pdf

du Plessis, A., le Roux, S. G., Booysen, G., & Els, J. (2016). Quality Control of a Laser Additive Manufactured Medical Implant by X-Ray Tomography. 3D Printing and Additive Manufacturing, 3(3), 175-182. http://online.liebertpub.com/doi/abs/10.1089/3dp.2016.0012

Krakhmalev, P., Fredriksson, G., Yadroitsava, I., Kazantseva, N., du Plessis, A., & Yadroitsev, I. (2016). Deformation behavior and microstructure of Ti6Al4V manufactured by SLM. Physics Procedia, 83, 778-788. http://www.sciencedirect.com/science/article/pii/S1875389216301870

du Plessis, A., le Roux, S. G., & Steyn, F. (2016). Quality Investigation of 3D Printer Filament Using Laboratory X-Ray Tomography. 3D Printing and Additive Manufacturing, 3(4), 262-267. http://online.liebertpub.com/doi/abs/10.1089/3dp.2016.0011

Moletsane, M. G., Krakhmalev, P., Kazantseva, N., Du Plessis, A., Yadroitsava, I., & Yadroitsev, I. (2016). Tensile properties and microstructure of direct metal laser-sintered TI6AL4V (ELI) Alloy. South African Journal of Industrial Engineering, 27(3), 110-121. http://www.scielo.org.za/scielo.php?pid=S2224-78902016000300010&script=sci_arttext&tlng=pt

The CT Scanner Facility at Stellenbosch University: An open access X-ray computed tomography laboratory. A du Plessis, SG le Roux, A Guelpa. Nuclear methods and instruments in Physics research B. Vol 384, p 32-39 (Oct 2016). http://www.sciencedirect.com/science/article/pii/S0168583X16303433
We kindly request academic users to cite this paper when referring to work done at our facility.

Comparison of medical and industrial X-ray computed tomography for non-destructive testing. A du Plessis, SG le Roux, A Guelpa. Case studies in nondestructive testing and evaluation. http://www.sciencedirect.com/science/article/pii/S2214657116300302

Non-destructive characterisation and quantification of the effect of conventional oven and forced convection continuous tumble (FCCT) roasting on the three-dimensional microstructure of whole wheat kernels using X-ray micro-computed tomography (μCT)
L Schoeman, A du Plessis, M Manley
Journal of Food Engineering 187, 1-13
http://www.sciencedirect.com/science/article/pii/S0260877416301406

Lindgren, O., Seifert, T., & Du Plessis, A. (2016). Moisture content measurements in wood using dual-energy CT scanning–a feasibility study. Wood Material Science & Engineering, 11(5), 312-317. http://www.tandfonline.com/doi/abs/10.1080/17480272.2016.1201863

A high-throughput X-ray micro-computed tomography (μCT) approach for measuring single kernel maize (Zea mays L.) volumes and densities
A Guelpa, A du Plessis, M Manley
Journal of Cereal Science 69, 321-328
http://www.sciencedirect.com/science/article/pii/S0733521016300595

The use of X-ray tomography in defining the spatial distribution of barite in the fluvially derived palaeosols of Vaalputs, Northern Cape Province, South Africa
CE Clarke, TO Majodina, A du Plessis, MAG Andreoli
Geoderma 267, 48-57

Using X-ray computed tomography analysis tools to compare the skeletal element morphology of fossil and modern frog (Anura) species
T Matthews, A du Plessis. Palaeontologia Electronica 19 (1), 1-46

Directionality of Cavities and Porosity Formation in Powder-Bed Laser Additive Manufacturing of Metal Components Investigated Using X-Ray Tomography
A du Plessis, SG le Roux, G Booysen, J Els
3D Printing and Additive Manufacturing 3 (1), 48-55

2015
A dataset describing brooding in three species of South African brittle stars, comprising seven high-resolution, micro X-ray computed tomography scans
J Landschoff, A Du Plessis, CL Griffiths – GigaScience, 2015. http://link.springer.com/article/10.1186/s13742-015-0093-2

Stephan G Le Roux, Anton Du Plessis, Abraham Rozendaal, The quantitative analysis of tungsten ore using X-ray microCT: Case study, Computers & Geosciences, Available online 14 September 2015, ISSN 0098-3004, http://www.sciencedirect.com/science/article/pii/S0098300415300509

Anton du Plessis, Stephan G le Roux, Johan Els, Gerrie Booysen, Deborah C Blaine. Application of microCT to the non-destructive testing of an additive manufactured titanium component. Case Studies in Nondestructive Testing and Evaluation. Accepted August 2015. http://www.sciencedirect.com/science/article/pii/S2214657115000155

Odne S. Burheim, Gregory A. Crymble, Robert Bock, Nabeel Hussain,Sivakumar Pasupathi, Anton du Plessis, Stephan le Roux, Frode Seland,Huaneng Su and Bruno G. Pollet, Thermal Conductivity in the Three Layered Regions of Micro Porous Layer Coated Porous Transport Layer for the PEM Fuel Cell, Int. Hydrogen Energy, Accepted 2015 http://www.sciencedirect.com/science/article/pii/S0360319915021497

Anton du Plessis, Stephan le Roux, Francis Steyn. X-ray computed tomography of consumer-grade 3D printed parts. 3D Printing and Additive Manufacturing. Accepted August 2015. http://online.liebertpub.com/toc/3dp/0/0

Letitia Schoeman, Paul Williams,  Anton du Plessis, Marena Manley. X-ray micro-computed tomography (µCT) for non-destructive characterisation of food. Trends in Food Science & Technology. Accepted August 2015. http://www.sciencedirect.com/science/article/pii/S0924224415300054

Salima Ikram, Ruhan Slabbert, Izak Cornelius, Anton du Plessis, Liani Colette Swanepoel, Henry Weber, Fatal Force-Feeding or Glutonous Gagging? The Death of Kestrel SACHM 2575, Journal of Archaeological Science. August 2015. http://www.sciencedirect.com/science/article/pii/S0305440315002617

Mojgan Vaziri, Anton du Plessis, Dick Sandberg & Sven Berg (2015): Nano X-ray tomography analysis of
the cell-wall density of welded beech joints, Wood Material Science & Engineering, http://dx.doi.org/10.1080/17480272.2015.1062418

du Plessis, A., & Rossouw, P. (2015). Investigation of Porosity Changes in Cast Ti6Al4V Rods After Hot Isostatic Pressing. Journal of Materials Engineering and PerformanceJune, 21-26. 10.1007_s11665-015-1580-4

du Plessis, A., le Roux, S.G., & van Rooyen, H. (2015). 3D X-ray Inspection of a Radio Controlled Airplane Engine. Materials Science Forum Vols. 828-829, 433-438. MSF.828-829.433

du Plessis, A., & Rossouw, P. (2015). X-ray computed tomography of a titanium aerospace investment casting. Case Studies in Nondestructive Testing and Evaluation3, 21-26. 1-s2.0-S2214657115000040-main

Guelpa, A., du Plessis, A., Kidd, M., & Manley, M. (2015). Non-destructive Estimation of Maize (Zea mays L.) Kernel Hardness by Means of an X-ray Micro-computed Tomography (μCT) Density Calibration. Food and Bioprocess Technology, 1-11. http://link.springer.com/article/10.1007/s11947-015-1502-3%20/fulltext.html

Du Plessis, A., Slabbert, R., Swanepoel, L. C., Els, J., Booysen, G. J., Ikram, S., & Cornelius, I. (2015). Three-dimensional model of an ancient Egyptian falcon mummy skeleton. Rapid Prototyping Journal21(4). http://www.emeraldinsight.com/doi/full/10.1108/RPJ-09-2013-0089

AA Ambushe, A du Plessis, RI McCrindle (2015). Laser-induced breakdown spectroscopy and inductively coupled plasma-mass spectrometry for determination of Cr in soils from Brits District, South Africa. Bulletin of the Chemical Society of Ethiopia http://www.ajol.info/index.php/bcse/article/view/122945

S.G. Le Roux, J.A. Miller, A.J. Dunford, C.E. Clarke. The dissolution kinetics of atacamite in the acid range and the stability of atacamite containing soils from Namaqualand, South Africa. Applied geochemistry 2015. http://www.sciencedirect.com/science/article/pii/S0883292715300378

2014

du Plessis, A., Olawuyi, B. J., Boshoff, W. P., & le Roux, S. G. (2014). Simple and fast porosity analysis of concrete using X-ray computed tomography. Materials and Structures, 1-10. 10.1617_s11527-014-0519-9

du Plessis, A., Seifert, T., Booysen, G., & Els, J. (2014). Microfocus X-ray computed tomography (CT) analysis of laser sintered parts. South African Journal of Industrial Engineering25(1), 39-49.

Richardson, S. H., Kahle, R. L., Shaw-Kahle, B., Gurney, J. J., & du Plessis, A. (2014, December). Metasomatic Diamond Formation revealed by X-Ray CT Scanning of Diamondiferous Eclogites from Southern Africa. In AGU Fall Meeting Abstracts (Vol. 1, p. 05).

2013

du Plessis, A., Steyn, J., Roberts, D. E., Botha, L. R., & Berger, L. R. (2013). A proof of concept demonstration of the automated laser removal of rock from a fossil using 3D X-ray tomography data. Journal of Archaeological Science,40(12), 4607-4611.

Miller, J. A., Faber, C., Rowe, C. D., Macey, P. H., & du Plessis, A. (2013). Eastward transport of the Monapo Klippe, Mozambique determined from field kinematics and computed tomography and implications for late tectonics in central Gondwana. Precambrian Research237, 101-115.

Du Plessis, A., Meincken, M., & Seifert, T. (2013). Quantitative determination of density and mass of polymeric materials using microfocus computed tomography. Journal of Nondestructive Evaluation32(4), 413-417.

Meincken, M., & Du Plessis, A. (2013). Visualising and quantifying thermal degradation of wood by computed tomography. European Journal of Wood and Wood Products71(3), 387-389.

2012

Cornelius, I., Swanepoel, L. C., Du Plessis, A., & Slabbert, R. (2012). Looking inside votive creatures: computed tomography (CT) scanning of ancient Egyptian mummified animals in Iziko museums of south Africa: a preliminary report. Akroterion57, 129-148.

Roberts, D.E., du Plessis, A., Steyn, J., Botha, L.R., Pityana, S., Berger, L.R. (2012). An investigation of Laser Induced Breakdown Spectroscopy for use as a control in the laser removal of rock from fossils found at the Malapa hominin site, South Africa. Spectrochimica Acta Part B: Atomic Spectroscopy, Volume 73, July 2012, Pages 48-54