搜索结果: 46-60 共查到“国际动态 物理化学”相关记录99条 . 查询时间(1.057 秒)
Nanoscale octopods that do double duty as catalysts and plasmonic sensors are lighting a path toward more efficient industrial processes, according to a Rice University scientist.Catalysts are su...
掺硼石墨烯可制成超高灵敏度气体传感器
硼石墨烯 超高灵敏度气体传感器
2015/11/4
一个国际联合研究小组宣布，通过在石墨烯中加入硼原子的方式，他们开发出一种灵敏度极高的气体传感器。该装置能“嗅”出空气中浓度极低的有害气体，在人们还未察觉时发出警报。该研究还有助于改善锂离子电池和场效应晶体管的性能。用石墨烯制成的气体传感器已具有很高灵敏度，但科学家们并不想止步于此，希望通过在石墨烯中掺入其他元素的方式让其性能得到进一步提升。
新型材料有望带来自给自足能源系统（图）
新型材料 自给自足 能源系统
2015/11/4
美国佛罗里达州立大学研究人员在最近一期《物理化学》杂志上发表论文称，他们开发出一种能模拟光合作用的人工材料，有望带来一种可持续的自给自足能源系统。可持续的自给自足能源系统应该对环境没有负面影响，不会产生二氧化碳和废水。但要建造这样一个系统，目前面临的难题是，如何设计出一种材料，既不会在分解水的过程中生锈，又能捕获能源，还要足够便宜以利于生产。
Solving slippery 80-year-old mystery,Tufts chemist discovers way to isolate single-crystal ice surfaces
slippery 80-year-old mystery Tufts chemist isolate single-crystal ice surfaces
2015/11/12
A Tufts University chemist has discovered a way to select specific surfaces of single-crystal ice for study, a long-sought breakthrough that could help researchers answer essential questions about cli...
We are all familiar with boiling a pot of water—flame from a stove heats the base of a metal pot, the metal transfers the heat to the water, and the temperature goes up and up until the water boils. P...
State-of-the-art ion cyclotron resonance magnet system offers researchers significantly more power and accuracy than ever before
State-of-the-art ion cyclotron resonance magnet system power accuracy
2015/10/13
A new world record magnet used to perform complex chemical analysis is now available for users at the National High Magnetic Field Laboratory (National MagLab). The 21 tesla (T) ion cyclotron resonanc...
新型水分离器可200小时不间断制氢（图）
新型水分离器 200小时 不间断制氢
2015/7/3
美国斯坦福大学研究人员日前发明了一种低成本水分离器，阴阳电极均采用同种催化剂氧化镍—铁，可一周七天每天24小时用水生产氢气和氧气，为交通和工业领域提供清洁、可再生的氢能源。该研究成果刊登在近日出版的《自然·通讯》杂志上。
Chemists Create “Comb” that Detects Terahertz Waves with Extreme Precision
Chemists Comb Terahertz Waves Extreme Precision
2015/4/29
Light can come in many frequencies, only a small fraction of which can be seen by humans. Between the invisible low-frequency radio waves used by cell phones and the high frequencies associated with i...
欧盟创新型自然解决方案加速海水油渍污染清除
欧盟 海水油渍污染清除
2015/3/3
鉴于海洋微生物的所向披靡无所不“吃”，因此海洋拥有巨大的自清洁能力，但自清洁需要花费一定的时间。世界海岸广泛分布的渡假圣地进入旅游旺季，沿岸海水的污染物清除，除利用传统的物理化学隔绝方法外，特别是浮在海水表面的泄漏油渍薄层的清除，因为需要花费太多时间，必须找到行之有效的快速解决方案。欧盟第七研发框架计划（FP7）提供900万欧元资助，总研发投入1250万欧元，由欧盟11个成员国及联系国希腊（总协调...
Most of our food, medicine, fuel, plastics and synthetic fibers wouldn’t exist without catalysts, materials that open favorable pathways for chemical reactions to run forth. And yet chemists don’t ful...
Potassium Salt Outperforms Precious Metals As a Catalyst
Potassium Salt Precious Metals a Catalyst
2015/3/4
"We have shown for the first time that you can efficiently make carbon–silicon bonds with a safe and inexpensive catalyst based on potassium rather than ultrarare precious metals like platinum, pallad...
Strongly interacting electrons in wacky oxide synchronize to work like the brain
Strongly interacting electrons wacky oxide synchronize work like the brain
2014/6/12
UNIVERSITY PARK, Pa. -- Current computing is based on binary logic -- zeroes and ones -- also called Boolean computing, but a new type of computing architecture stores information in the frequencies a...
“The vibrations alone are not adequate, but combined with other classical techniques in physical organic chemistry, we are able to predict how reactions can occur,” says chemistry professor Matt Sigma...
仿生“继电器”大大提高人造树叶反应速度
仿生 继电器 人造树叶 反应速度
2014/2/20
最近，美国亚利桑那州立大学（ASU）科学家和阿尔贡国家实验室合作，模拟自然界光合作用中的一个重要环节，开发出一种仿生电子“继电器”，大大提高了人造树叶的反应速度，在廉价高效地利用太阳能把水转化为氢气和氧气方面迈出了重要一步。相关论文在线发表于最近的《自然·化学》上。
The University of Queensland team challenges the limits of famous quantum principle（图）
quantum principle quantum particles
2014/7/9
A team of physicists is challenging the very limits of Heisenberg’s famous uncertainty principle by measuring quantum particles with unprecedented accuracy.