金刚石表面纳米尺度水分子的相变观测  

Phase transition observation of nanoscale water on diamond surface

作　　者：杨志平 孔熙 石发展 杜江峰 Yang Zhi-Ping;Kong Xi;Shi Fa-Zhan;Du Jiang-Feng(Hefei National Laboratory for Physical Sciences at the Microscale,School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China;CAS Key Laboratory of Microscale Magnetic Resonance,University of Science and Technology of China,Hefei 230026,China;State Key Laboratory of Solid State Microstructures,Department of Physics,Nanjing University,Nanjing 210093,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学物理学院,合肥微尺度物质科学国家研究中心,合肥230026 [2]中国科学技术大学,中国科学院微观磁共振重点实验室,合肥230026 [3]南京大学物理系,固体微结构国家重点实验室,南京210093 [4]中国科学技术大学,中国科学院量子信息与量子科技创新研究院,合肥230026

出　　处：《物理学报》2022年第6期298-304,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:81788101,11722544,91636217);国家重点研发计划(批准号:2018YFA0306600,2016YFA0502400);中国科学院(批准号:GJJSTD20170001,QYZDY-SSW-SLH004);量子通信与量子计算机重大项目安徽省引导性项目(批准号:AHY050000)资助的课题.

摘　　要：水是自然界中最重要的物质之一,研究界面或受限体系的水分子动力学具有重要的科学意义.近些年新兴的基于氮-空位(NV)色心的纳米磁共振技术可以同时观测纳米尺度的核磁信号和温度.本文利用单个NV色心成功探测到金刚石表面纳米尺度水分子分别在固态和液态条件下的核磁信号,并通过改变温度成功观测到该纳米尺度水层的固-液相变.实验结果表明,基于NV色心的核磁共振技术可以有效地探测纳米尺度物质的结构和动力学行为,为纳米尺度受限体系相关科学的研究提供新的探测手段.Water is one of the most important substances in the world.It is a crucial issue to study the dynamics of water molecules at interfaces or in the confined systems.In recent years,the emerging magnetic resonance technique based on nitrogen-vacancy(NV)center has allowed us to observe the nanoscale nuclear magnetic signal and temperature simultaneously.Here we succeed in measuring the nuclear magnetic resonance(NMR)signals of nanoscale solid and liquid water on diamond surface by NV center,and observing the solid-liquid phase transition of these nano-water by temperature control.This work demonstrates that the nano-NMR technique based on NV centers can probe the dynamics behavior of nanoscale materials effectively,providing a new way for studying the nanoscale confined systems.

关 键 词：氮-空位色心 量子传感 纳米核磁共振 水分子固-液相变 

分 类 号：TB383.1[一般工业技术—材料科学与工程]