ORCID Profile
0000-0003-4422-8077
Current Organisations
The University of Auckland
,
CSIRO Clayton
,
CSIRO
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Publications
Meandering Pattern 433 MHz Antennas for Ingestible Capsules
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Catalytic Metal Foam by Chemical Melting and Sintering of Liquid Metal Nanoparticles
Publisher: Wiley
Date: 25-11-2020
Innovative learning environments and student orientation to learning: a kaleidoscopic framework
Publisher: Springer Science and Business Media LLC
Date: 09-01-2023
Gallium nitride formation in liquid metal sonication
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TC04302H
Abstract: This work presents the room temperature nitridation of gallium-based liquid metal alloy particles during sonication.
Induction heating for the removal of liquid metal-based implant mimics: A proof-of-concept
Publisher: Elsevier BV
Date: 06-2022
Liquid-Metal-Assisted Deposition and Patterning of Molybdenum Dioxide at Low Temperature
Publisher: American Chemical Society (ACS)
Date: 11-2021
Polydopamine Shell as a Ga3+ Reservoir for Triggering Gallium–Indium Phase Separation in Eutectic Gallium–Indium Nanoalloys
Publisher: American Chemical Society (ACS)
Date: 06-10-2021
Liquid Metal Droplet and Graphene Co-Fillers for Electrically Conductive Flexible Composites
Publisher: Wiley
Date: 29-09-2020
Abstract: Colloidal liquid metal alloys of gallium, with melting points below room temperature, are potential candidates for creating electrically conductive and flexible composites. However, inclusion of liquid metal micro- and nanodroplets into soft polymeric matrices requires a harsh auxiliary mechanical pressing to rupture the droplets to establish continuous pathways for high electrical conductivity. However, such a destructive strategy reduces the integrity of the composites. Here, this problem is solved by incorporating small loading of nonfunctionalized graphene flakes into the composites. The flakes introduce cavities that are filled with liquid metal after only relatively mild press-rolling ( 30 kPa. The composites are used for forming flexible electrically-conductive tracks in electronic circuits with a self-healing property. The demonstrated application of co-fillers, together with liquid metal droplets, can be used for establishing electrically-conductive printable-composite tracks for future large-area flexible electronics.
Liquid metals for tuning gas sensitive layers
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TC01544B
Abstract: Liquid metals can offer extraordinary properties for application in the field of sensors, yet their potential has not been fully realised.
Telecommunications and Data Processing in Flexible Electronic Systems
Publisher: Wiley
Date: 08-11-2020
Patchworks of professional practices: Teacher collaboration in innovative learning environments
Publisher: Informa UK Limited
Date: 29-09-2021
Pulsing Liquid Alloys for Nanomaterials Synthesis
Publisher: American Chemical Society (ACS)
Date: 11-09-2020
Doping Process of 2D Materials Based on the Selective Migration of Dopants to the Interface of Liquid Metals
Publisher: Wiley
Date: 12-09-2021
Abstract: The introduction of trace impurities within the doping processes of semiconductors is still a technological challenge for the electronics industries. By taking advantage of the selective enrichment of liquid metal interfaces, and harvesting the doped metal oxide semiconductor layers, the complexity of the process can be mitigated and a high degree of control over the outcomes can be achieved. Here, a mechanism of natural filtering for the preparation of doped 2D semiconducting sheets based on the different migration tendencies of metallic elements in the bulk competing for enriching the interfaces is proposed. As a model, liquid metal alloys with different weight ratios of Sn and Bi in the bulk are employed for harvesting Bi 2 O 3 ‐doped SnO nanosheets. In this model, Sn shows a much stronger tendency than Bi to occupy surface sites of the Bi–Sn alloys, even at the very high concentrations of Bi in the bulk. This provides the opportunity for creating SnO 2D sheets with tightly controlled Bi 2 O 3 dopants. By way of ex le, it is demonstrated how such nanosheets could be made selective to both reducing and oxidizing environmental gases. The process demonstrated here offers significant opportunities for future synthesis and fabrication processes in the electronics industries.
An Enhanced Key Management Scheme for LoRaWAN
Publisher: MDPI AG
Date: 02-11-2018
DOI: 10.3390/CRYPTOGRAPHY2040034
Abstract: The LoRaWAN is one of the new low-power wide-area network (LPWAN) standards applied to Internet of Things (IoT) technology. The key features of LPWAN are its low power consumption and long-range coverage. The LoRaWAN 1.1 specification includes a basic security scheme. However, this scheme could be further improved in the aspect of key management. In this paper, LoRaWAN 1.1 security is reviewed, and enhanced LoRaWAN security with a root key update scheme is proposed. The root key update will make cryptoanalysis of security keys in LoRaWAN more difficult. The analysis and simulation show that the proposed root key update scheme requires fewer computing resources compared with other key derivation schemes, including the scheme used in the LoRaWAN session key update. The results also show the key generated in the proposed scheme has a high degree of randomness, which is a basic requirement for a security key.
Sustaining youth physical activity in times of challenge and change: lessons from COVID-19
Publisher: Oxford University Press (OUP)
Date: 04-05-2023
Abstract: Physical activity (PA) is recognized as essential for positive physical and mental well-being in young people. However, participation in PA is known to decline as adolescents emerge into adulthood under the influence of complex social and structural factors. Globally, COVID-19 restrictions resulted in changes to PA and PA participation levels in youth populations, providing a unique opportunity for gaining insight into PA barriers and enablers in circumstances of challenge, limitation and change. This article details young people’s self-reported PA behaviours during the 4-week 2020 COVID-19 lockdown in New Zealand. Taking a strengths-based view and drawing on the COM-B (capabilities, opportunity and motivation behaviour) model for behaviour change, the study explores factors enabling young people to sustain or increase PA during lockdown. Findings are drawn from qualitative-dominant mixed-methods analyses of responses to an online questionnaire: New Zealand Youth Voices Matter (16–24 years N = 2014). Key insights included the importance of habit and routine, time and flexibility, social connections, incidental exercise and awareness of links between PA and well-being. Of note were the positive attitudes, creativity and resiliency demonstrated as young people substituted or invented alternatives to their usual PA. PA needs to change to adapt to new circumstances over the life course, and youth understanding and knowledge of modifiable factors may provide support for this. Thus these findings have implications for sustaining PA during late adolescence and emerging adulthood, a life phase that can be associated with significant challenge and change.
Low Temperature Nano Mechano-electrocatalytic CH4 Conversion
Publisher: American Chemical Society (ACS)
Date: 26-04-2022
Abstract: Transforming natural resources to energy sources, such as converting CH
Insights into the Interfacial Contact and Charge Transport of Gas-Sensing Liquid Metal Marbles
Publisher: American Chemical Society (ACS)
Date: 23-06-0200
Abstract: Understanding the interfacial contacts between liquid metals and substrate materials is becoming increasingly important for the fast-rising liquid metal-enabled technologies. However, for such technologies, probing the contact behavior and interfacial charge transport has remained challenging due to the deformable nature of liquid metals and the presence of the surface oxide layer. Here, we encapsulate eutectic gallium indium (EGaIn) micro-/nanodroplets with tungsten trioxide (WO
Nanotip Formation from Liquid Metals for Soft Electronic Junctions
Publisher: American Chemical Society (ACS)
Date: 30-08-2021
Polyphenol-Induced Adhesive Liquid Metal Inks for Substrate-Independent Direct Pen Writing
Publisher: Wiley
Date: 11-12-2021
Impact of Minor Alloy Components on the Electrocapillarity and Electrochemistry of Liquid Metal Fractals
Publisher: Wiley
Date: 19-05-2023
Abstract: Exploring and controlling surface tension‐driven phenomena in liquid metals may lead to unprecedented possibilities for next‐generation microfluidics, electronics, catalysis, and materials synthesis. In pursuit of these goals, the impact of minor constituents within liquid alloys is largely overlooked. Herein, it is showed that the presence of a fraction of solute metals such as tin, bismuth, and zinc in liquid gallium can significantly influence their electrocapillarity and electrochemistry. The instability‐driven fractal formation of liquid alloy droplets is investigated with different solutes and reveals the formation of distinctive non‐branched droplets, unstable fractals, and stable fractal modes under controlled voltage and alkaline solution conditions. In their in idually unique fractal morphology diagrams, different liquid alloys demonstrate significantly shifted voltage thresholds in transition between the three fractal modes, depending on the choice of the solute metal. Surface tension measurements, cycle voltammetry and surface compositional characterizations provide strong evidence that the minor alloy components drastically alter the surface tension, surface electrochemical oxidation, and oxide dissolution processes that govern the droplet deformation and instability dynamics. The findings that minor components are able to regulate liquid alloys’ surface tensions, surface element distributions and electrochemical activities offer great promises for harnessing the tunability and functionality of liquid metals.
Related Organisations
Commonwealth Scientific And Industrial Research Organisation
Location: Australia
Related Funding Activities
No related grants have been discovered for Jialuo Han.