Ramachandran Tholkappiyan, Ali Ashraf, Butt Haider, Zheng Lianxi, Deader Firdous Ahmad, Rezeq Moh'd
Department of Physics, Khalifa University of Science and Technology Abu Dhabi P. O. Box 127788 United Arab Emirates
Department of Mechanical & Nuclear Engineering, Khalifa University of Science and Technology Abu Dhabi P. O. Box 127788 United Arab Emirates.
Nanoscale Adv. 2024 Oct 2;6(22):5478-510. doi: 10.1039/d4na00666f.
Noble 2D monolayers of gold nanoparticles (Au-NPs) have garnered significant attention due to their unique physicochemical properties, which are instrumental in various technological applications. This review delves into the intricate physical chemistry underlying the formation of Au-NP monolayers, highlighting key interactions such as electrostatic forces, van der Waals attractions, and ligand-mediated stabilization. The discussion extends to the size- and shape-dependent assembly processes of these NP monolayers, elucidating how nanoparticle dimensions and morphologies influence monolayer formation and stability. Moreover, the review explores the diverse interfaces-solid, liquid, and air-where Au-NP monolayers are employed, each presenting distinct advantages and challenges. In the realm of applications, Au-NP monolayers have shown remarkable promises. In memory devices, their ability to facilitate high-density data storage through enhanced electron transport mechanisms is examined. Biosensing applications benefit from the monolayers' exceptional sensitivity and specificity, which are crucial for detecting biomolecular interactions. Furthermore, the role of Au-NP monolayers in electrocatalysis is explored, with a focus on their catalytic efficiency and stability in various electrochemical reactions. Despite their potential, the deployment of Au-NP monolayers faces several challenges. The review addresses current limitations such as scalability, reproducibility, and long-term stability, proposing potential strategies to overcome these hurdles. Future prospects are also discussed, including the development of multifunctional monolayers and integration with other nanomaterials to enhance performance across different applications. In conclusion, while significant strides have been made in understanding and utilizing 2D Au-NP monolayers, ongoing research is imperative to fully exploit their capabilities. Addressing existing challenges through innovative approaches will pave the way for their widespread adoption in advanced technological applications.
二维金纳米颗粒（Au-NPs）单层因其独特的物理化学性质而备受关注，这些性质在各种技术应用中发挥着重要作用。本综述深入探讨了Au-NP单层形成背后复杂的物理化学过程，重点介绍了诸如静电力、范德华引力和配体介导的稳定性等关键相互作用。讨论还扩展到这些NP单层的尺寸和形状依赖性组装过程，阐明了纳米颗粒尺寸和形态如何影响单层的形成和稳定性。此外，本综述还探讨了Au-NP单层应用的各种界面——固体、液体和空气，每种界面都有其独特的优势和挑战。在应用领域，Au-NP单层展现出了巨大的潜力。在存储设备中，研究了它们通过增强电子传输机制促进高密度数据存储的能力。生物传感应用受益于单层卓越的灵敏度和特异性，这对于检测生物分子相互作用至关重要。此外，还探讨了Au-NP单层在电催化中的作用，重点关注它们在各种电化学反应中的催化效率和稳定性。尽管它们具有潜力，但Au-NP单层的应用仍面临一些挑战。本综述阐述了当前的局限性，如可扩展性、可重复性和长期稳定性，并提出了克服这些障碍的潜在策略。还讨论了未来的前景，包括多功能单层的开发以及与其他纳米材料的整合，以提高不同应用中的性能。总之，虽然在理解和利用二维Au-NP单层方面已经取得了重大进展，但持续的研究对于充分发挥其能力至关重要。通过创新方法应对现有挑战将为它们在先进技术应用中的广泛采用铺平道路。
