Category: Nanotech
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Plant-based hydrogels use sunlight for sustainable carbon capture
Aug 28, 2023 (Nanowerk Spotlight) The escalating climate crisis has intensified the global search for sustainable solutions to counteract the adverse effects of greenhouse gas emissions. Carbon capture and storage (CCS), a method that involves selectively capturing and storing carbon dioxide (CO2) emissions, has emerged as a promising strategy. However, traditional methods have their limitations.…
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Multiwavelength high speed quantum well nanowire array micro-LED for next-generation on-chip optical communication
Aug 28, 2023 (Nanowerk News) As the number of cores in a processor continues to grow, so too does the challenge of connecting them all together. Traditional electrical networks fall short due to latency, limited bandwidth, and high-power consumption. Researchers have long sought for a better alternative, and on-chip nanophotonic systems have emerged as a…
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Researcher finds inspiration from spider webs and beetles to harvest fresh water from thin air
Aug 28, 2023 (Nanowerk News) A team of researchers is designing novel systems to capture water vapour in the air and turn it into liquid. University of Waterloo professor Michael Tam and his PhD students Yi Wang and Weinan Zhao have developed sponges or membranes with a large surface area that continually capture moisture from…
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New type of visible-light responsive photocatalyst is efficient, stable and very economical
Aug 28, 2023 (Nanowerk News) Researchers at the University of Johannesburg have developed a new type of photocatalyst that harnesses the visible portion of the sunlight spectrum. Currently, economical and environmentally-friendly photocatalysts only ‘use’ the UV spectrum of sunlight, example the commonly-used titanium dioxide and other close equivalents. The research is published in Journal of…
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Site-directed placement of three-dimensional DNA origami
Rothemund, P. W. K. Folding DNA to create nanoscale shapes and patterns. Nature 440, 297–302 (2006). Article CAS Google Scholar Douglas, S. M. et al. Self-assembly of DNA into nanoscale three-dimensional shapes. Nature 459, 414–418 (2009). Article CAS Google Scholar Seeman, N. C. DNA in a material world. Nature 421, 427–431 (2003). Article Google Scholar …
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Wide-range and area-selective threshold voltage tunability in ultrathin indium oxide transistors
Indium has been utilized across a variety of applications (element scarcity is shown in Supplementary Table 1), including displays (e.g., IGZO), transparent electrodes (e.g., ITO), and solar cells (e.g., CIGS). In this study, ultrathin In2O3 is employed as the channel material of a transistor, as shown schematically in Fig. 1a. The transistor is fabricated using atomic layer…
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Superconductivity in twisted double bilayer graphene stabilized by WSe2
Cao, Y. et al. Unconventional superconductivity in magic-angle graphene superlattices. Nature 556, 43–50 (2018). Article CAS Google Scholar Park, J. M., Cao, Y., Watanabe, K., Taniguchi, T. & Jarillo-Herrero, P. Tunable strongly coupled superconductivity in magic-angle twisted trilayer graphene. Nature 590, 249–255 (2021). Article CAS Google Scholar Hao, Z. et al. Electric field–tunable superconductivity in…
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Shared control of a 16 semiconductor quantum dot crossbar array
Fabrication The device is fabricated on a Ge/SiGe heterostructure where a 16-nm-thick germanium quantum well with a maximum hole mobility of 2.5 × 105 cm2 V−1 s−1 is buried 55 nm below the semiconductor/oxide interface25,40. We design the quantum dot plunger gates with a diameter of 100 nm, and the barrier gates separating the quantum dots with a width of 30 nm. The…
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Reconfigurable reservoir computing in a magnetic metamaterial
Response of nanoring arrays The devices studied here consist of arrays of 10 nm thick Ni80Fe20 (Permalloy, Py) nanorings, patterned into a square lattice with each ring having nominal diameters of 4μm and track widths of 400 nm, each overlapping with its nearest neighbours across 50% of their track widths35,36. The arrays were fabricated by electron beam…
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Two-photon nanoprobes based on bioorganic nanoarchitectonics with a photo-oxidation enhanced emission mechanism
TPA NPs preparation and characterization Supramolecular self-assembly has been extensively used as a method to assemble NPs with novel optical properties35,36. In this regard, amino acid derivatives are versatile building blocks due to their ease of synthesis and wide variety of physicochemical features, and have thus attracted increasing attention for the design of these NPs37.…