scispace - formally typeset
Search or ask a question
Institution

University of Wollongong

EducationWollongong, New South Wales, Australia
About: University of Wollongong is a education organization based out in Wollongong, New South Wales, Australia. It is known for research contribution in the topics: Population & Graphene. The organization has 15674 authors who have published 46658 publications receiving 1197471 citations. The organization is also known as: UOW & Wollongong University.
Topics: Population, Graphene, Mental health, Anode, Lithium


Papers
More filters
Journal ArticleDOI
TL;DR: A positive piezoconductive effect is reported in liquid metal-filled magnetorheological elastomers comprising a hybrid of fillers of liquid metal microdroplets and metallic magnetic microparticles that has prospective applications in sensors, stretchable conductors, and responsive thermal interfaces.
Abstract: Conductive elastic composites have been used widely in soft electronics and soft robotics. These composites are typically a mixture of conductive fillers within elastomeric substrates. They can sense strain via changes in resistance resulting from separation of the fillers during elongation. Thus, most elastic composites exhibit a negative piezoconductive effect, i.e. the conductivity decreases under tensile strain. This property is undesirable for stretchable conductors since such composites may become less conductive during deformation. Here, we report a liquid metal-filled magnetorheological elastomer comprising a hybrid of fillers of liquid metal microdroplets and metallic magnetic microparticles. The composite's resistivity reaches a maximum value in the relaxed state and drops drastically under any deformation, indicating that the composite exhibits an unconventional positive piezoconductive effect. We further investigate the magnetic field-responsive thermal properties of the composite and demonstrate several proof-of-concept applications. This composite has prospective applications in sensors, stretchable conductors, and responsive thermal interfaces.

223 citations

Journal ArticleDOI
TL;DR: In this article, a facile in situ synthesis of a 3D interconnected FeS@Fe3C@graphitic carbon composite via chemical vapor deposition (CVD) followed by a sulfuration strategy is developed.
Abstract: Iron sulfides have been attracting great attention as anode materials for high-performance rechargeable sodium-ion batteries due to their high theoretical capacity and low cost. In practice, however, they deliver unsatisfactory performance because of their intrinsically low conductivity and volume expansion during charge–discharge processes. Here, a facile in situ synthesis of a 3D interconnected FeS@Fe3C@graphitic carbon (FeS@Fe3C@GC) composite via chemical vapor deposition (CVD) followed by a sulfuration strategy is developed. The construction of the double-layered Fe3C/GC shell and the integral 3D GC network benefits from the catalytic effect of iron (or iron oxides) during the CVD process. The unique nanostructure offers fast electron/Na ion transport pathways and exhibits outstanding structural stability, ensuring fast kinetics and long cycle life of the FeS@Fe3C@GC electrodes for sodium storage. A similar process can be applied for the fabrication of various metal oxide/carbon and metal sulfide/carbon electrode materials for high-performance lithium/sodium-ion batteries.

223 citations

Journal ArticleDOI
TL;DR: The finding that mammoth and horse overlapped with humans for several millennia in the region where people initially entered the Americas challenges theories that megafaunal extinction occurred within centuries of human arrival or were due to an extraterrestrial impact in the late Pleistocene.
Abstract: Causes of late Quaternary extinctions of large mammals (“megafauna”) continue to be debated, especially for continental losses, because spatial and temporal patterns of extinction are poorly known. Accurate latest appearance dates (LADs) for such taxa are critical for interpreting the process of extinction. The extinction of woolly mammoth and horse in northwestern North America is currently placed at 15,000–13,000 calendar years before present (yr BP), based on LADs from dating surveys of macrofossils (bones and teeth). Advantages of using macrofossils to estimate when a species became extinct are offset, however, by the improbability of finding and dating the remains of the last-surviving members of populations that were restricted in numbers or confined to refugia. Here we report an alternative approach to detect ‘ghost ranges’ of dwindling populations, based on recovery of ancient DNA from perennially frozen and securely dated sediments (sedaDNA). In such contexts, sedaDNA can reveal the molecular presence of species that appear absent in the macrofossil record. We show that woolly mammoth and horse persisted in interior Alaska until at least 10,500 yr BP, several thousands of years later than indicated from macrofossil surveys. These results contradict claims that Holocene survival of mammoths in Beringia was restricted to ecologically isolated high-latitude islands. More importantly, our finding that mammoth and horse overlapped with humans for several millennia in the region where people initially entered the Americas challenges theories that megafaunal extinction occurred within centuries of human arrival or were due to an extraterrestrial impact in the late Pleistocene.

223 citations

Journal ArticleDOI
TL;DR: In this paper, an approach for preparing a free-standing ACNT/PEDOT/PVDF membrane electrode that is lightweight, flexible, highly electroactive and conductive, and mechanically robust is presented.
Abstract: We present here an approach for preparing a nanostructured “free-standing” ACNT/PEDOT/PVDF membrane electrode that is lightweight, flexible, highly electroactive and conductive, and mechanically robust. It could be directly and easily fabricated into a rechargeable lithium-ion battery as the anode material without using a metal substrate or binder.

223 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the effect of smear due to vertical drain installation and found that a significant reduction in the horizontal permeability takes place toward the central drain, whereas the vertical permeability remains relatively unchanged.
Abstract: This paper is mainly concerned with a laboratory study to investigate the effect of smear due to vertical drain installation. The extent of the smear zone around a vertical drain was studied utilizing a large-scale consolidometer apparatus. The test results reveal that a significant reduction in the horizontal permeability takes place toward the central drain, whereas the vertical permeability remains relatively unchanged. The radius of the smear zone was estimated to be a factor of four to five times the radius of the central drain (mandrel), and the measured ratio of horizontal to vertical permeability approached unity at the drain-soil interface. The laboratory measured settlements are subsequently compared with the predictions based on the theory of Hansbo and the finite element method. It is of relevance to note that the inclusion of the correct variation of permeability ratios of the smear zone in the plane strain finite element analysis improves the accuracy of settlement predictions.

223 citations


Authors

Showing all 15918 results

NameH-indexPapersCitations
Lei Jiang1702244135205
Menachem Elimelech15754795285
Yoshio Bando147123480883
Paul Mitchell146137895659
Jun Chen136185677368
Zhen Li127171271351
Neville Owen12770074166
Chao Zhang127311984711
Jay Belsky12444155582
Shi Xue Dou122202874031
Keith A. Johnson12079851034
William R. Forman12080053717
Yang Li117131963111
Yusuke Yamauchi117100051685
Guoxiu Wang11765446145
Network Information
Related Institutions (5)
University of New South Wales
153.6K papers, 4.8M citations

96% related

University of Queensland
155.7K papers, 5.7M citations

95% related

University of Sydney
187.3K papers, 6.1M citations

93% related

Australian National University
109.2K papers, 4.3M citations

93% related

University of Melbourne
174.8K papers, 6.3M citations

93% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20241
202388
2022483
20212,897
20203,018
20192,784