Chemical Grafting, Exfoliation and Dynamics of One and Two-Dimensional Boron-Nitride Nanostructures

一维和二维氮化硼纳米结构的化学接枝、剥离和动力学

• 批准号: 1807737
• 负责人: Angel Marti
• 金额: $ 42万
• 依托单位: William Marsh Rice 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: 2018-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1807737&HistoricalAwards=false
• 关键词: Chemical; Grafting; Exfoliation; Dynamics; Two

Advances in nanotechnology have been central to the creation of novel biomedical applications, energy transport and storage systems, aerospace materials, and solar energy conversion. This research explores novel nanostructures made of boron nitride (BN). Graphene is one type of nanocarbon in which a honeycomb arrangement of carbon atoms forms a thin sheet. When graphene is seamlessly rolled, it forms carbon nanotubes, a well-known material. Alternating boron and nitrogen atoms can replace carbon in carbon nanotubes to form BN nanostructures, BN nanostructures are wide band gap semiconductors with outstanding thermal stability, in contrast to their carbon analogs. Concentrating on these special differences, Professors Angel Marti and Matteo Pasquali of Rice University, are exploring how to tune the properties of BN nanostructures by attaching chemical groups to their surfaces and by monitoring their movements in solution. This information may enable the assembly of these nanostructures into sophisticated systems with tailored physical, chemical, and mechanical properties. This research may accelerate discovery and innovation in producing insulating films, corrosion protections, and UV optoelectronics. Professors Marti and Pasquali disseminate their research to the greater community through press releases and YouTube videos. They provide cutting-edge nanoscience activities such as workshops, talks, and summer research opportunities by reaching out to high school, college, and graduate students, paying particular attention to underrepresented groups. The research team recruits and mentors undergraduate students from Puerto Rico via the Louis Stokes Alliances for Minority Participation (LSAMP) Program. LSAMP facilitates the training of underrepresented students in cutting-edge nanoscience research. Supported by the Macromolecular, Supramolecular and Nanochemistry Program of NSF's Chemistry Division, Professors Marti and Pasquali are addressing fundamental challenges of BN nanostructures such as surface functionalization, exfoliation, dispersion, and imaging. BN nanostructures are functionalized with a variety of groups by virtue of organic radicals produced under Billups-Birch conditions (lithium in liquid ammonia). The properties of these functionalized structures are studied in different environments and solvents. Furthermore, the dispersibility of BN materials are studied in surfactants having different charges and polarities to understand the conditions that lead to their dispersion in aqueous solution. Dispersed structures are studied by fluorescence microscopy, using special fluorescent surfactants, to understand the dynamics of the BN nanotubes in solution. Overcoming these challenges advances fundamental knowledge of the chemistry and properties of one- and two-dimensional BN nanostructures.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.

纳米技术的进步已经成为创造新的生物医学应用、能源运输和储存系统、航空航天材料和太阳能转换的核心。本研究探索了由氮化硼（BN）制成的新型纳米结构。石墨烯是一种纳米碳，其中碳原子的蜂窝状排列形成了薄片。当石墨烯被无缝轧制时，它会形成碳纳米管，这是一种众所周知的材料。硼原子和氮原子交替可以取代碳纳米管中的碳原子形成氮化硼纳米结构，氮化硼纳米结构是宽带隙半导体，与碳类似物相比，具有出色的热稳定性。莱斯大学的Angel Marti教授和Matteo Pasquali教授专注于这些特殊的差异，他们正在探索如何通过将化学基团附着在BN纳米结构的表面并通过监测它们在溶液中的运动来调整其性质。这些信息可以使这些纳米结构组装成具有定制的物理、化学和机械性能的复杂系统。这项研究可能会加速绝缘薄膜、防腐和紫外光电产品的发现和创新。Marti教授和Pasquali教授通过新闻稿和YouTube视频向更大的社区传播他们的研究。他们通过接触高中、大学和研究生，提供尖端的纳米科学活动，如研讨会、讲座和夏季研究机会，特别关注代表性不足的群体。研究小组通过路易斯·斯托克斯少数民族参与联盟（LSAMP）项目从波多黎各招募和指导本科生。LSAMP促进了在尖端纳米科学研究中代表性不足的学生的培训。在美国国家科学基金会化学部大分子、超分子和纳米化学项目的支持下，Marti教授和Pasquali教授正在研究BN纳米结构的基本挑战，如表面功能化、剥离、分散和成像。利用billup - birch条件下（液氨中的锂）产生的有机自由基，氮化硼纳米结构被多种基团功能化。研究了这些功能化结构在不同环境和溶剂中的性能。此外，研究了BN材料在具有不同电荷和极性的表面活性剂中的分散性，以了解导致其在水溶液中分散的条件。利用荧光显微镜，利用特殊的荧光表面活性剂研究了分散结构，以了解氮化硼纳米管在溶液中的动力学。克服这些挑战，推进了一维和二维氮化硼纳米结构的化学和性质的基础知识。该奖项反映了美国国家科学基金会的法定使命，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

Scalable Purification of Boron Nitride Nanotubes via Wet Thermal Etching

• DOI: 10.1021/acs.chemmater.8b03785
• 发表时间: 2019-03-12
• 期刊: CHEMISTRY OF MATERIALS
• 影响因子: 8.6
• 作者: Marincel, Daniel M.;Adnan, Mohammed;Pasquali, Matteo
• 通讯作者: Pasquali, Matteo

Tunable Alkylation of White Graphene (Hexagonal Boron Nitride) Using Reductive Conditions

• DOI: 10.1021/acs.jpcc.9b05416
• 发表时间: 2019-08-15
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY C
• 影响因子: 3.7
• 作者: de los Reyes, Carlos A.;Hernandez, Katharyn;Marti, Angel A.
• 通讯作者: Marti, Angel A.

Fluorinated Boron Nitride Quantum Dots: A New 0D Material for Energy Conversion and Detection of Cellular Metabolism

• DOI: 10.1002/ppsc.201800346
• 发表时间: 2018-12
• 期刊: Particle & Particle Systems Characterization
• 影响因子: 2.7
• 作者: Sruthi Radhakrishnan;J. Park;R. Neupane;Carlos A. los Reyes;P. M. Sudeep;M. Paulose;A. Martí;C. Tiwary;V. Khabashesku;O. Varghese;B. Kaipparettu;P. Ajayan

Understanding the Exfoliation and Dispersion of Hexagonal Boron Nitride Nanosheets by Surfactants: Implications for Antibacterial and Thermally Resistant Coatings

了解表面活性剂对六方氮化硼纳米片的剥离和分散：对抗菌和耐热涂料的影响

• DOI: 10.1021/acsanm.0c02437
• 发表时间: 2021
• 期刊: ACS Applied Nano Materials
• 影响因子: 5.9
• 作者: Smith McWilliams, Ashleigh D.;Martínez-Jiménez, Cecilia;Matatyaho Ya’akobi, Asia;Ginestra, Cedric J.;Talmon, Yeshayahu;Pasquali, Matteo;Martí, Angel A.
• 通讯作者: Martí, Angel A.

Real-Time Visualization and Dynamics of Boron Nitride Nanotubes Undergoing Brownian Motion

氮化硼纳米管布朗运动的实时可视化和动力学

• DOI: 10.1021/acs.jpcb.0c03663
• 发表时间: 2020
• 期刊: The Journal of Physical Chemistry B
• 作者: Smith McWilliams, Ashleigh D.;Tang, Zhao;Ergülen, Selin;de los Reyes, Carlos A.;Martí, Angel A.;Pasquali, Matteo
• 通讯作者: Pasquali, Matteo