Novel phase change materials with tunable transition properties

具有可调转变特性的新型相变材料

• 批准号: 1809520
• 负责人: Haiyan Wang
• 金额: $ 41.75万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1809520&HistoricalAwards=false
• 关键词: Novel; phase; change; materials; tunable

Non-technical Description: Oxide-based phase change materials represent an interesting family of materials with ability to dramatically change their physical properties during phase transition processes. Vanadium dioxide (VO2), as one of the representatives, is of particular interest because of its phase transition could occur close to room temperature. The project seeks to tune the phase transition properties (e.g., phase transition temperature) through a novel two-phase nanocomposite design approach. By combining VO2 with a metal as a secondary metal phase in the nanocomposite thin films, the phase transition properties are tuned in a wide range. Such tunable transition properties are critical for various applications, including thermal actuators, electrical switching devices and smart windows. In addition to scientific and technological impacts, this research provides training to graduate and undergraduate students in the multidisciplinary research area of phase change materials, thin film growth and materials characterizations. The research findings are disseminated through in-class teaching modules related to phase change materials, summer research for undergraduates and high school students, and various outreach activities sponsored by Purdue Women in Engineering Program and Birck Nanoday events.Technical Description: The project focuses on a fundamental material exploration of novel two -phase metal-VO2 nanocomposite designs, their phase change properties and the fundamental switching mechanisms as functions of the metal selections and the nanoparticle dimensions, density and geometries. As one of the Mott insulating oxide materials, VO2 exhibits an ultrafast and reversible phase transition from a semiconductor phase to a metallic phase at about 68 ?C during heating process. To enable its practical applications, tunable transition properties (e.g., phase transition temperature tuning over a broad temperature range) are very much desired. Specifically, the project focuses on synthesizing the two-phase metal-VO2 nanocomposites in an epitaxial thin film form, tuning the transition temperature and phase transition properties via selection of metals, as well as understanding the fundamental phase transition mechanisms via tailoring the two-phase morphology, e.g., the metal phase geometry, density, dimension, etc. The phase change properties are measured by a set of electrical transport and optical measurements, coupled with a detailed microstructural characterization, including high resolution transmission electron microscopy, atomic scale elemental mapping and strain mapping. The two-phase nanocomposite design and the fundamental understanding on the phase transition mechanisms can be applied to other Mott insulating oxide systems for tunable phase change properties beyond VO2.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术描述：氧化物基相变材料代表了一个有趣的材料家族，能够在相变过程中显著改变其物理性质。二氧化钒（VO 2）作为其中的代表，由于其在室温附近就能发生相变而引起人们的特别关注。该项目寻求调整相变特性（例如，相变温度）。通过将VO 2与金属结合作为纳米复合薄膜中的第二金属相，在宽范围内调节相变性质。这种可调的过渡特性对于各种应用至关重要，包括热致动器，电气开关设备和智能窗户。除了科学和技术的影响，这项研究提供培训，研究生和本科生在相变材料，薄膜生长和材料表征的多学科研究领域。研究成果通过与相变材料相关的课堂教学模块、本科生和高中生的暑期研究以及普渡大学女性工程项目和Birck Nanoday活动赞助的各种外展活动进行传播。技术说明：该项目的重点是新型两相金属-VO 2纳米复合材料设计的基础材料探索，它们的相变性质和基本的开关机制作为金属选择和纳米颗粒尺寸、密度和几何形状的函数。作为Mott绝缘氧化物材料之一，VO 2在约68 ℃时表现出从半导体相到金属相的超快可逆相变。C在加热过程中。为了实现其实际应用，可调的过渡特性（例如，在宽的温度范围上的相变温度调谐）是非常需要的。具体而言，该项目的重点是以外延薄膜形式合成两相金属-VO 2纳米复合材料，通过选择金属来调节转变温度和相变特性，以及通过定制两相形态来理解基本相变机制，例如，的金属相的几何形状，密度，尺寸等的相变特性是通过一组电传输和光学测量，加上详细的微观结构表征，包括高分辨率透射电子显微镜，原子尺度元素映射和应变映射测量。两相纳米复合材料的设计和对相变机制的基本理解可以应用于其他莫特绝缘氧化物系统，以获得超过VO 2的可调相变特性。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Core-shell metallic alloy nanopillars-in-dielectric hybrid metamaterials with magneto-plasmonic coupling

• DOI: 10.1016/j.mattod.2021.10.024
• 发表时间: 2021-11
• 期刊: Materials Today
• 影响因子: 24.2
• 作者: Jijie Huang;X. L. Phuah;L. McClintock;P. Padmanabhan;K. Vikrant;Han Wang;Di Zhang;Haohan Wang

AlN-based hybrid thin films with self-assembled plasmonic Au and Ag nanoinclusions

• DOI: 10.1063/1.5083950
• 发表时间: 2019-01
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Xuejing Wang;T. Nguyễn;Yang Cao;J. Jian;O. Malis;Haiyan Wang

Multifunctional Metal–Oxide Nanocomposite Thin Film with Plasmonic Au Nanopillars Embedded in Magnetic La 0.67 Sr 0.33 MnO 3 Matrix

磁性La 0.67 Sr 0.33 MnO 3 基体中嵌入等离子体Au纳米柱的多功能金属氧化物纳米复合薄膜

• DOI: 10.1021/acs.nanolett.0c04213
• 发表时间: 2021
• 期刊: Nano Letters
• 影响因子: 10.8
• 作者: Huang, Jijie;Wang, Han;Qi, Zhimin;Lu, Ping;Zhang, Di;Zhang, Bruce;He, Zihao;Wang, Haiyan
• 通讯作者: Wang, Haiyan

Self‐Assembled Ag–TiN Hybrid Plasmonic Metamaterial: Tailorable Tilted Nanopillar and Optical Properties

• DOI: 10.1002/adom.201801180
• 发表时间: 2018-12
• 期刊: Advanced Optical Materials
• 影响因子: 9
• 作者: Xuejing Wang;J. Jian;Zhiguang Zhou;C. Fan;Yaomin Dai;Leigang Li;Jijie Huang;Jianing Sun;A. Donohue;P. Bermel;Xinghang Zhang;Houtong Chen;Haiyan Wang

Perovskite Transparent Conducting Oxide for the Design of a Transparent, Flexible, and Self-Powered Perovskite Photodetector

用于透明、柔性和自供电钙钛矿光电探测器设计的钙钛矿透明导电氧化物

• DOI: 10.1021/acsami.0c01298
• 发表时间: 2020
• 期刊: ACS Applied Materials & Interfaces
• 影响因子: 9.5
• 作者: Xu Ruixing;Min Liangliang;Qi Zhimin;Zhang Xiyuan;Jian Jie;Ji Y;a;Qian Fengjiao;Fan Jiyu;Kan Caixia;Wang Haiyan;Tian Wei;Li Liang;Li Weiwei;Yang Hao
• 通讯作者: Yang Hao