Two-dimensional transition metal chalcogenide nanomaterials for cancer diagnosis and treatment

For more than a decade,the exfoliation of graphene and other layered materials has led to a tremendous amount of research in two-dimensional(2D)materials,among which 2D transition metal chalcogenides(TMCs)nanomaterials have attracted much attention in a wide range of applications including photoelectric devices,lithium-ion batteries,catalysis,and energy conversion and storage owing to their unique photoelectric physical properties.With such large specific surface area,strong near-infrared(NIR)absorption and abundant chemical element composition,2D TMCs nanomaterials have become good candidates in biomedical imaging and cancer treatment.This review systematically summarizes recent progress on 2D TMCs nanomaterials,which includes their synthesis methods and applications in cancer treatment.At the end of this review,we also highlight the future prospects and challenges of 2D TMCs nanomaterials.It is expected that this work can provide the readers with a detailed overview of the synthesis of 2D TMCs and inspire more novel functional biomaterials based on 2D TMCs for cancer treatment in the future.

Phase engineering two-dimensional nanostructures for electrocatalytic hydrogen evolution reaction

Hydrogen(H2)is considered to be a promising substitute for fossil fuels.Two-dimensional(2D)nanomaterials have exhibited an efficient electrocatalytic capacity to catalyze hydrogen evolution reaction(HER).Particularly,phase engineering of 2D nanomaterials is opening a novel research direction to endow 2D nanostructures with fascinating properties for deep applications in catalyzing HER.In this review,we briefly summarize the research progress and present the current challenges on phase engineering of 2D nanomaterials for their applications in electrocatalytic HER.Our summary will be of significance to provide fundamental understanding for designing novel 2D nanomaterials with unconventional phases to electrochemically catalyze HER.

二维纳米材料MXenes的性质及应用研究进展

二维层状过渡金属碳/氮化物(MXenes)以其独特的晶体特征和结构特性受到越来越多的关注,尤其是在能源、催化、环境等领域的应用中体现出优异的性能。本文系统地综述MXenes独特的稳定性、机械性能、电子性质、磁性质、光学性质、热电性能、铁电及压电性质,同时总结分析MXenes在电池领域、电化学电容器领域及催化领域的应用所取得的最新进展及研究成果,最后对MXenes及其复合材料的未来发展前景及面临的挑战进行探讨。

二维材料最新研究进展

Research on two-dimensional(2D) materials has been explosively increasing in last seventeen years in varying subjects including condensed matter physics, electronic engineering, materials science, and chemistry since the mechanical exfoliation of graphene in 2004. Starting from graphene, 2D materials now have become a big family with numerous members and diverse categories. The unique structural features and physicochemical properties of 2D materials make them one class of the most appealing candidates for a wide range of potential applications. In particular, we have seen some major breakthroughs made in the field of 2D materials in last five years not only in developing novel synthetic methods and exploring new structures/properties but also in identifying innovative applications and pushing forward commercialisation. In this review, we provide a critical summary on the recent progress made in the field of 2D materials with a particular focus on last five years. After a brief backgroundintroduction, we first discuss the major synthetic methods for 2D materials, including the mechanical exfoliation, liquid exfoliation, vapor phase deposition, and wet-chemical synthesis as well as phase engineering of 2D materials belonging to the field of phase engineering of nanomaterials(PEN). We then introduce the superconducting/optical/magnetic properties and chirality of 2D materials along with newly emerging magic angle 2D superlattices. Following that, the promising applications of 2D materials in electronics, optoelectronics, catalysis, energy storage, solar cells, biomedicine, sensors, environments, etc. are described sequentially. Thereafter, we present the theoretic calculations and simulations of 2D materials. Finally, after concluding the current progress, we provide some personal discussions on the existing challenges and future outlooks in this rapidly developing field.

二维过渡金属碳氮化合物的生物医学应用

二维过渡金属碳化物、氮化物及碳氮化合物(MXenes)是一类新兴的二维纳米材料。由于其独特的光、电、磁、热等物理化学性能,MXenes二维材料被广泛应用到能源储备、环境监测、化学催化等领域。由于其大的比表面积、优异的近红外吸收和组分可调换等性质,近年来在生物医学方面也得到了快速的发展。简要介绍了MXenes二维纳米材料的制备方法、表面修饰、生物应用(生物检测、生物成像、药物载体和肿瘤治疗)以及生物安全性研究,并对MXenes二维纳米材料在未来生物医学领域的发展进行了展望。