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Highly Permeable and Selective Pore‐Spanning Biomimetic Membrane Embedded with Aquaporin Z
Small - Tập 8 Số 8 - Trang 1185-1190 - 2012
Large‐Area Vapor‐Phase Growth and Characterization of MoS<sub>2</sub> Atomic Layers on a SiO<sub>2</sub> Substrate
Small - Tập 8 Số 7 - Trang 966-971 - 2012
Plasmonic Nanogap‐Enhanced Raman Scattering Using a Resonant Nanodome Array Abstract The optical properties and surface‐enhanced Raman scattering (SERS) of plasmonic nanodome array (PNA) substrates in air and aqueous solution are investigated. PNA substrates are inexpensively and uniformly fabricated with a hot spot density of 6.25 × 106 mm−2 using a large‐area nanoreplica moulding technique on a flexible plastic substrate. Both experimental measurement and numerical simulation results show that PNAs exhibit a radiative localized surface plasmon resonance (LSPR) due to dipolar coupling between neighboring nanodomes and a non‐radiative surface plasmon resonance (SPR) resulting from the periodic array structure. The high spatial localization of electromagnetic field within the ∼10 nm nanogap together with the spectral alignment between the LSPR and excited and scattered light results in a reliable and reproducible spatially averaged SERS enhancement factor (EF) of 8.51 × 107 for Au‐coated PNAs. The SERS enhancement is sufficient for a wide variety of biological and chemical sensing applications, including detection of common metabolites at physiologically relevant concentrations.
Small - Tập 8 Số 18 - Trang 2878-2885 - 2012
SnS 3D Flowers with Superb Kinetic Properties for Anodic Use in Next-Generation Sodium Rechargeable Batteries
Small - Tập 12 Số 18 - Trang 2510-2517 - 2016
Carbon Nanomaterials for Advanced Energy Conversion and Storage Abstract It is estimated that the world will need to double its energy supply by 2050. Nanotechnology has opened up new frontiers in materials science and engineering to meet this challenge by creating new materials, particularly carbon nanomaterials, for efficient energy conversion and storage. Comparing to conventional energy materials, carbon nanomaterials possess unique size‐/surface‐dependent (e.g., morphological, electrical, optical, and mechanical) properties useful for enhancing the energy‐conversion and storage performances. During the past 25 years or so, therefore, considerable efforts have been made to utilize the unique properties of carbon nanomaterials, including fullerenes, carbon nanotubes, and graphene, as energy materials, and tremendous progress has been achieved in developing high‐performance energy conversion (e.g., solar cells and fuel cells) and storage (e.g., supercapacitors and batteries) devices. This article reviews progress in the research and development of carbon nanomaterials during the past twenty years or so for advanced energy conversion and storage, along with some discussions on challenges and perspectives in this exciting field.
Small - Tập 8 Số 8 - Trang 1130-1166 - 2012
Design Strategy for Porous Composites Aimed at Pressure Sensor Application Abstract Flexible and highly sensitive pressure sensors have versatile biomedical engineering applications for disease diagnosis and healthcare. The fabrication of such sensors based on porous structure composites usually requires complex, costly, and nonenvironmentally friendly procedures. As such, it is highly desired to develop facile, economical, and environment‐friendly fabrication strategies for highly sensitive lightweight pressure sensors. Herein, a novel design strategy is reported to fabricate porous composite pressure sensors via a simple heat molding of conductive fillers and thermoplastic polyurethane (TPU) powders together with commercially available popcorn salts followed by water‐assisted salt removal. The obtained TPU/carbon nanostructure (CNS) foam sensors have a linear resistance response up to 60% compressive strain with a gauge factor (G F ) of 1.5 and show reversible and reproducible piezoresistive properties due to the robust electrically conductive pathways formed on the foam struts. Such foam sensors can be potentially utilized for guiding squatting exercises and respiration rate monitoring in daily physical training.
Small - Tập 15 Số 45 - 2019
Ultrathin Layered SnSe Nanoplates for Low Voltage, High‐Rate, and Long‐Life Alkali–Ion Batteries Abstract 2D electrode materials with layered structures have shown huge potential in the fields of lithium‐ and sodium‐ion batteries. However, their poor conductivity limits the rate performance and cycle stability of batteries. Herein a new colloid chemistry strategy is reported for making 2D ultrathin layered SnSe nanoplates (SnSe NPs) for achieving more efficient alkali‐ion batteries. Due to the effect of weak Van der Waals forces, each semiconductive SnSe nanoplate stacks on top of each other, which can facilitate the ion transfer and accommodate volume expansion during the charge and discharge process. This unique structure as well as the narrow‐bandgap semiconductor property of SnSe simultaneously meets the requirements of achieving fast ionic and electronic conductivities for alkali‐ion batteries. They exhibit high capacity of 463.6 mAh g−1 at 0.05 A g−1 for Na‐ion batteries and 787.9 mAh g−1 at 0.2 A g−1 for Li‐ion batteries over 300 cycles, and also high stability for alkali‐ion batteries.
Small - Tập 13 Số 46 - 2017
Design, Fabrication, and Mechanics of 3D Micro‐/Nanolattices Abstract Over the past several decades, lattice materials have been developed and used as engineering materials for lightweight and stiff industrial structures. Recent advances in additive manufacturing techniques have prompted the emergence of architected materials with minimum characteristic sizes ranging from several micrometers to hundreds of nanometers. Taking advantage of the topological design, structural optimization, and size effects of nanomaterials, various 3D micro‐/nanolattice materials composed of different materials exhibit combinations of superior mechanical properties, such as low density, high strength (even approaching the theoretical limits), large deformability, good recoverability, and flaw tolerance. As a result, some micro‐/nanolattices occupy an unprecedented area in Ashby charts with a combination of different material properties. Here, recent advances in the fabrication and mechanics of micro‐/nanolattices are described. First, various design principles and advanced techniques used for the fabrication of micro‐/nanolattices are summarized. Then, the mechanical behaviors and properties of micro‐/nanolattices are further described, including the compressive Young's modulus, strength, energy absorption, recoverability, and tensile behavior, with an emphasis on mechanistic insights and origins. Finally, the main challenges in the fabrication and mechanics of micro‐/nanolattices are addressed and an outlook for further investigations and potential applications of micro‐/nanolattices in the future is provided.
Small - Tập 16 Số 15 - 2020
TiO<sub>2</sub> Nanotube Surfaces: 15 nm—An Optimal Length Scale of Surface Topography for Cell Adhesion and Differentiation
Small - Tập 5 Số 6 - Trang 666-671 - 2009
Selective Void Deposition by Continuous, Ultrathin Ag Film Enabled Stable, High‐Performance AgNWs‐Based Transparent Heaters Abstract Metallic nanowire‐based transparent conductors (MNTCs) are essential to various technologies, including displays, heat‐regulating windows, and photo‐communication. Hybrid configurations are primarily adopted to design stable, high‐functioning MNTCs. Although hybrid MNTCs enhance electrical performance, they often suffer from optical degradation due to losses associated with the hybrid layers. Highly conductive hybrid MNTCs with minimal reduction in transparency are achieved with AgNWs/Ag(O)/Al‐doped ZnO (AZO) design. The design provides a high visible light transmittance of 95.1%, representing a minimized optical loss of 3% compared to pristine AgNWs by optimizing optical interference between the AZO and Ag(O) layers. Furthermore, it allows for enhanced mobility of metallic nanowires by controlling the selective formation of conductive layers in the voids of the nanowire networks. The oxygen additive enables a continuous Ag ultrathin film of 6 nm in the macro‐voids of AgNWs system, corresponding to 25 times higher mobility for AgNWs/Ag(O)/AZO than that of sole AgNWs. The significant enhancement in the mobility of AgNWs/Ag(O)/AZO induces a reduction of sheet resistance of MNTCs by 73%. The AgNWs/Ag(O)/AZO, with an optimized sheet resistance of 24 Ω sq−1 , is explored for transparent heater applications, demonstrating a fast thermal response with reliable stability, as evidenced by consistent high‐temperature profiles during prolonged operation.
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