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Water on surfaces from first-principles molecular dynamics
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作者 Peiwei You Jiyu Xu +1 位作者 Cui Zhang Sheng Meng 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第11期37-43,共7页
Water is ubiquitous and so is its presence in the proximity of surfaces.To determine and control the properties of interfacial water molecules at nanoscale is essential for its successful applications in environmental... Water is ubiquitous and so is its presence in the proximity of surfaces.To determine and control the properties of interfacial water molecules at nanoscale is essential for its successful applications in environmental and energy-related fields.It is very challenging to explore the atomic structure and electronic properties of water under various conditions,especially at the surfaces.Here we review recent progress and open challenges in describing physicochemical properties of water on surfaces for solar water splitting,water corrosion,and desalination using first-principles approaches,and highlight the key role of these methods in understanding the complex electronic and dynamic interplay between water and surfaces.We aim at showing the importance of unraveling fundamental mechanisms and providing physical insights into the behavior of water on surfaces,in order to pave the way to water-related material design. 展开更多
关键词 first-principles molecular dynamics water at surfaces reaction mechanism
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非绝热量子动力学模拟方法及其在凝聚态体系中的应用
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作者 陈大强 游佩桅 +4 位作者 聂正蔚 武娜 廉超 张萃 孟胜 《科学通报》 EI CAS CSCD 北大核心 2021年第24期3088-3099,共12页
密度泛函理论(density functional theory, DFT)可以准确地预测由电子和原子核组成的普通物质的基态电子结构,而当涉及量子体系含时演化的模拟时,比如模拟超快激光与分子或凝聚态体系相互作用的激发态动力学过程,就需要发展实时密度泛... 密度泛函理论(density functional theory, DFT)可以准确地预测由电子和原子核组成的普通物质的基态电子结构,而当涉及量子体系含时演化的模拟时,比如模拟超快激光与分子或凝聚态体系相互作用的激发态动力学过程,就需要发展实时密度泛函理论(real-time time-dependent density functional theory, rt-TDDFT)和非绝热动力学相结合的新颖计算方法.本文介绍了基于rt-TDDFT的Ehrenfest动力学方法,并结合路径积分分子动力学提出了RPTDAP量子动力学方法. RP-TDAP方法引入了非绝热效应和原子核的量子效应,可以对电子波函数和原子核波包构成的耦合系统进行量子化动力学模拟.这些方法使我们不仅可以准确地理解激发态电子结构、电声相互作用、光致电荷传输、光化学反应等非绝热过程的内在机理,而且可以超越平均场理论给出一个全新的视角来描述原子核的量子行为.本文还应用这些方法研究了几个重要的非绝热动力学现象,说明这些方法可以广泛地用于复杂体系的量子激发超快动力学研究. 展开更多
关键词 第一性原理 非绝热动力学 核量子效应 光激发 含时密度泛函理论
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