搜索结果: 46-60 共查到“国际动态 材料科学”相关记录148条 . 查询时间(1.441 秒)
Nanoclusters self-organize into centimeter-scale hierarchical assemblies（图）
纳米团簇 自组织 分层组件
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2023/5/22
Nature may abhor a vacuum, but it sure loves structure. Complex, self-organized assemblies are found throughout the natural world, from double-helix DNA molecules to the photonic crystals that make bu...
Styrofoam egg cartons, hard plastic compact disc cases, red drinking cups and many other common products are composed of polystyrene, a type of plastic that makes up a third of landfill waste worldwid...
Fabricating the large numbers of computer chips that are found in a multitude of everyday objects, from cell phones to car navigation systems, relies on the use of precise, microscopic stencils that c...
As the world struggles to improve the efficiency of cars and other vehicles in order to curb greenhouse gas emissions and improve the range of electric vehicles, the search is on for ever-lighter mate...
碳纳米管手性改造与分子结晶体管研究取得重要进展（图）
半导体 碳纳米管 电学性质
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2022/2/17
半导体性碳纳米管具有大长径比、无悬键表面、高载流子迁移率、室温弹道输运等独特结构特征和优异电学性质，因而被认为是十纳米以下高性能、低功耗晶体管沟道材料的有力候选。碳纳米管的导电属性取决于其螺旋（手性）结构，通常制备出的碳纳米管为金属性和半导体性碳纳米管的混合物。虽然近年来碳纳米管的结构控制生长与手性分离研究取得了较大进展，但单根碳纳米管的手性及导电属性调控仍是本领域研究的关键和难点。
The strongest part of a tree lies not in its trunk or its sprawling roots, but in the walls of its microscopic cells.
Scientists discover a mysterious transition in an electronic crystal（图）
电子晶体 层状化合物 热跨度 电气开关 非易失性存储器
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2023/6/7
When temperature changes, many materials undergo a phase transition, such as liquid water to ice, or a metal to a superconductor. Sometimes, a so-called hysteresis loop accompanies such a phase change...
A staple on any engineer’s workbench, duct tape is a quick and dependable fix for cracks and tears in many structural materials. MIT engineers have now developed a kind of surgical duct tape — a stron...
Using a novel polymerization process, MIT chemical engineers have created a new material that is stronger than steel and as light as plastic, and can be easily manufactured in large quantities.
The wettability of a surface — whether drops of water or another liquid bead up or spread out when they come into contact with it — is a crucial factor in a wide variety of commercial and industrial a...
金属3D打印材料综合材料清单（图）
金属3D打印材料 金属增材制造
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2022/8/21
采用金属增材制造取决于其能够打印的材料。世界各地的公司很久以前就认识到了这一驱动力，并一直在不懈地努力扩展金属3D打印材料库。对新金属材料开发的持续研究以及传统公认材料的鉴定有助于这项技术获得更广泛的认可。为了了解可用于3D打印的材料，在web上找到的金属3D打印材料的列表清单。金属3D打印材料包括：铝、钢、钴铬合金、钛、镍、铜、难熔金属、贵金属。
镁及镁合金是公认的最轻的结构金属材料之一，是21世纪具有巨大发展和应用潜力的绿色材料。镁合金具有重量轻、强度高、力学性能好、散热性好等优点，是轻型汽车的材料。随着电子时代的到来，肯定会有越来越多的应用。
Sometimes it’s good to be a little bad.
Corrosion can improve materials’ durability
腐蚀 材料科学 耐用性
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2023/5/23
When it comes to the integrity of structural alloys, a little corrosion may sometimes be a good thing.
Polymer enables tougher recyclable thermoplastics
聚合物 可回收 热塑性塑料
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2023/5/23
To synthesize plastic, small monomer molecules need to be strung together like beads in a necklace, creating long polymer chains.