Explanipedia

Surface visualisation of bacterial biofilms using neutral atom microscopy Open

Nick A. von Jeinsen, David J. Ward, Matthew Bergin, Sam Lambrick, David M. Williamson , et al. · 2025

The scanning helium microscope (SHeM) is a new technology that uses a beam of neutral helium atoms to image surfaces non‐destructively and with extreme surface sensitivity. Here, we present the application of the SHeM to image bacterial bi…

Heliometric stereo: A new frontier in surface profilometry Open

Aleksandar Radić, Sam Lambrick, Chun Hai Zhao, Nick A. von Jeinsen, A. P. Jardine , et al. · 2025

Accurate and reliable measurements of three-dimensional surface structures are important for a broad range of technological and research applications, including materials science, nanotechnology, and biomedical research. Scanning helium mi…

Controlling Charge Generation in Organic Photovoltaic Ternary Blends: How Trace Ternary Additives Determine Mechanism Open

Nathan A. Cooling, Krishna Feron, Timothy W. Jones, Warwick J. Belcher, Paul C. Dastoor · 2025

A series of modified tetraphenylporphyrins varying only in the electron-donating or electron-withdrawing character of the substituents in the para-phenyl position have been blended into the active layer of MEH-PPV:PCBM bulk heterojunction …

Determining the Cost of Organic Photovoltaic Material and Its Impact on the Levelized Cost of Electricity Open

Jonas M. Bjuggren, Tomas J. Marsh, Alaa Al‐Ahmad, Kamilla Sivunova, Mitchell Bonham , et al. · 2025

The field of organic photovoltaics (OPV) has delivered significant performance increases through the development of donor polymers and non-fullerene acceptors (NFAs). However, these improvements have come at the expense of increased synthe…

Spatially resolved lattice characterization using a scanning helium microscope Open

Matthew Bergin, C.J. Hatchwell, Matthew G. Barr, Adam Fahy, Paul C. Dastoor · 2025

Investigating gender bias in first year physics examinations Open

M. J. Gladys, J. E. Furst, John Holdsworth, Paul C. Dastoor · 2025

The short answer section of the final attainment test for the Advanced Physics I course at the University of Newcastle, Australia was investigated for performance bias based on gender. No overall gender bias was discovered, however there w…

Heliometric stereo: a new frontier in surface profilometry Open

Aleksandar Radić, Sam Lambrick, Chenyang Zhao, Nick von Jeinsen, A. P. Jardine , et al. · 2025

Accurate and reliable measurements of three-dimensional surface structures are important for a broad range of technological and research applications, including materials science, nanotechnology, and biomedical research. Scanning helium mi…

Sidechain engineering in poly(2,3-alkylthieno[3,4-<i>b</i>]pyrazine)s <i>via</i> GRIM polymerization: solubility, film formation, and device performance Open

Spencer J. Gilman, Nicolas C. Nicolaidis, Tomas J. Marsh, Paul C. Dastoor, Seth C. Rasmussen · 2025

A study of linear vs. branched sidechains on GRIM-polymerized poly(2,3-dialkylthieno[3,4- b ]pyrazine)s show improved solubility, processibility, and devices for the branched analogue, allowing competitive NIR photodetectors able to detect…

Ångström-Scale Topography in Neutral Atom Microscopy Open

Sabrina D. Eder, Adam Fahy, Matthew G. Barr, J. R. Manson, Bodil Holst , et al. · 2025

Printed Solar: Nanoparticle Dispersions as a Pathway to Solvent-Free Manufacturing Open

Paul C. Dastoor · 2025

Surface Visualization of a Bacterial Biofilm using Scanning Helium Microscopy Open

Nick A. von Jeinsen, David J. Ward, Matthew Bergin, Sam Lambrick, David M. Williamson , et al. · 2024

The scanning helium microscope (SHeM) is an emerging technology that uses a beam of neutral helium atoms to form images with extreme surface sensitivity and non-destructive qualities. Here, we present the first application of SHeM to image…

Comparing attendance versus exam performance for topics within first year physics courses Open

M. J. Gladys, Paul C. Dastoor · 2024

This paper revisits the relationship between lecture attendance and final exam performance of students attending first year Advanced Physics classes at The University of Newcastle. The results compare attendance to non-attendance for topic…

Organic Nano‐Junctions: Linking Nanomorphology and Charge Transport in Organic Semiconductor Nanoparticles for Organic Photovoltaic Devices Open

Hugo Laval, Yue Tian, Virginia Lafranconi, Matthew G. Barr, Paul C. Dastoor , et al. · 2024

In this study, innovative nanoscale devices are developed to investigate the charge transport in organic semiconductor nanoparticles. Using different steps of lithography techniques and dielectrophoresis, planar organic nano‐junctions are …

Printing and Coating Techniques for Scalable Organic Photovoltaic Fabrication Open

Bradley P. Kirk, Jonas M. Bjuggren, Gunther G. Andersson, Paul C. Dastoor, Mats R. Andersson · 2024

Within recent years, there has been an increased interest towards organic photovoltaics (OPVs), especially with their significant device performance reaching beyond 19% since 2022. With these advances in the device performance of laborator…

Upscaling laboratory organic electronic sensor devices to roll-to-roll printing: The effect of printable electrodes on device operation Open

Daniel Elkington, Nathan A. Cooling, Swee Lu Lim, Trieu N. Trinh, Alaa Al‐Ahmad , et al. · 2024

The prospect of large-scale production of low-cost electronic devices is a driving factor behind the recent interest in printed organic electronics. However, the upscaling of laboratory organic electronic devices is extremely challenging s…

Measuring scattering distributions in scanning helium microscopy Open

C.J. Hatchwell, Matthew Bergin, Bob Carr, Matthew G. Barr, Adam Fahy , et al. · 2024

A scanning helium microscope typically utilises a thermal energy helium atom beam, with an energy and wavelength (¡100meV, ∼0.05 nm) particularly sensitive to surface structure. An angular detector stage for a scanning helium microscope is…

Measuring scattering distributions in scanning helium microscopy Open

C.J. Hatchwell, Matthew Bergin, Bob Carr, Matthew G. Barr, Adam Fahy , et al. · 2023

A scanning helium microscope typically utilises a thermal energy helium atom beam, with an energy and wavelength (<100 meV, ~0.05 nm) particularly sensitive to surface structure. An angular detector stage for a scanning helium microscope i…

Gender bias in first-year multiple-choice physics examinations Open

M. J. Gladys, J. E. Furst, John Holdsworth, Paul C. Dastoor · 2023

The multiple-choice section of the final examination for the first-year Advanced Physics I course at the University of Newcastle, Australia between 2010 and 2018 was investigated for gender bias. A Mantel-Haenszel analysis revealed that ap…

Optimization of Bulk Heterojunction Organic Photovoltaics Open

Alaa Y. Ali, Natalie P. Holmes, Nathan A. Cooling, John Holdsworth, Warwick J. Belcher , et al. · 2023

The performance of poly(3-hexylthiophene) (P3HT): phenyl-C61-butyric acid methyl ester (PCBM) organic photovoltaic (OPV) devices was found to be strongly influenced by environmental during preparation, thermal annealing conditions, and the…

Nonuniform electron distributions in a solenoidal ioniser Open

Matthew Bergin, J. Martens, Paul C. Dastoor · 2023

Solenoidal ionisers are a new class of highly efficient helium detectors that are increasingly important for high resolution atom scattering, molecular scattering and scanning helium microscopy. They operate via electron ionisation, where …

Design Parameters and Human Biocompatibility Assessment Protocols for Organic Semiconducting Neural Interfaces: Toward a Printed Artificial Retina with Color Vision Open

Connor P. Sherwood, Rafael Crovador, Jessie A. Posar, Nathan M. Brichta, Matthew P. Simunovic , et al. · 2023

Organic semiconductors have emerged as promising neural interfacing materials due to their innate biocompatibility, soft mechanical properties, and mixed electron/ion conduction. One exciting application is their use as artificial photosen…

Sub-resolution contrast in neutral helium microscopy through facet scattering for quantitative imaging of nanoscale topographies on macroscopic surfaces Open

Sabrina D. Eder, Adam Fahy, Matthew G. Barr, J. R. Manson, Bodil Holst , et al. · 2023

Nanoscale thin film coatings and surface treatments are ubiquitous across industry, science, and engineering; imbuing specific functional or mechanical properties (such as corrosion resistance, lubricity, catalytic activity and electronic …

Optimizing the Spatial Nonuniformity of Irradiance in a Large-Area LED Solar Simulator Open

Alaa Al‐Ahmad, John Holdsworth, Benjamin Vaughan, Warwick J. Belcher, Xiaojing Zhou , et al. · 2022

The solar simulator has allowed all photovoltaic devices to be developed and tested under laboratory conditions. Filtered xenon arc lamps were the gold-standard source for solar simulation of small-area silicon photovoltaic devices; howeve…

Driving Course Engagement Through Multimodal Strategic Technologies Open

M. J. Gladys, Lachlan J. Rogers, Galiya Sharafutdinova, Nicholas Barnham, Patrick Nichols , et al. · 2022

This paper describes the development of a new second-year level undergraduate Physics course at the University of Newcastle, comprising three four-week modules (encompassing Special Relativity, Nuclear and Particle Physics) for a combined …

The Role of the Electron Transport Layer in the Degradation of Organic Photovoltaic Cells Open

Alaa Al‐Ahmad, Benjamin Vaughan, John Holdsworth, Warwick J. Belcher, Xiaojing Zhou , et al. · 2022

The performance of the electron transport layer (ETL) plays a critical role in extending the operational lifespan of organic photovoltaic devices. ZnO is an excellent electron transport layer used in the printable organic photovoltaic cell…

Low-Temperature CVD-Grown Graphene Thin Films as Transparent Electrode for Organic Photovoltaics Open

Alaa Y. Ali, Natalie P. Holmes, Mohsen Ameri, Krishna Feron, Mahir N. Thameel , et al. · 2022

Good conductivity, suitable transparency and uniform layers of graphene thin film can be produced by chemical vapour deposition (CVD) at low temperature and utilised as a transparent electrode in organic photovoltaics. Using chlorobenzene …

Surfactant Engineering and Its Role in Determining the Performance of Nanoparticulate Organic Photovoltaic Devices Open

Riku Chowdhury, Natalie P. Holmes, Nathan A. Cooling, Warwick J. Belcher, Paul C. Dastoor , et al. · 2022

The fabrication of organic photovoltaics (OPVs) from non-hazardous nanoparticulate (NP) inks offers considerable promise for the development of eco-friendly large-scale printed solar modules. However, the typical NP core-shell morphology (…

Observation of diffuse scattering in scanning helium microscopy Open

Sam Lambrick, Matthew Bergin, David J. Ward, Matthew G. Barr, Adam Fahy , et al. · 2022

By studying well defined geometries (microspheres) in scanning helium microscopy (SHeM) the default scattering distribution for technological surfaces in SHeM is found to be diffuse and approximately cosine.

Remote Learning Facilitated by MyScope Explore Open

Natalie P. Holmes, Matthew J. Griffith, Matthew G. Barr, Nicolas C. Nicolaidis, Vijay Bhatia , et al. · 2021

In response to the requirements imposed by the COVID-19 pandemic in 2020, we developed a remote learning undergraduate workshop for 44 students at the University of Newcastle by embedding scanning electron microscope (SEM) images of Maratu…

Controlling Nanostructure in Inkjet Printed Organic Transistors for Pressure Sensing Applications Open

Matthew J. Griffith, Nathan A. Cooling, Daniel Elkington, Michael Wasson, Xiaojing Zhou , et al. · 2021

This work reports the development of a highly sensitive pressure detector prepared by inkjet printing of electroactive organic semiconducting materials. The pressure sensing is achieved by incorporating a quantum tunnelling composite mater…

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