基于双层石墨烯纳米带的可调谐表面等离子体诱导透明

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Plasmonically Induced Transparency in Double-Layered Graphene Nanoribbons 本文主要讨论了基于双层石墨烯纳米带的 plasmonically induced transparency(PIT),该技术可以实现动态可调节的 PIT,且不依赖于极化方向。 首先,需要了解什么是 plasmonically induced transparency。PIT 是一种基于表面等离子体的现象,当两个表面等离子体耦合时,会出现透明带,导致电磁波的吸收和散射减少。这种现象有着广泛的应用前景,如隐身技术、光电器件和生物检测等。 传统的 PIT 系统通常使用一条 bright 模式和一条 dark 模式的耦合来实现,但这种方法存在着一些缺陷,如极化方向的限制和设备设计的复杂性。为了克服这些挑战,研究人员提出了基于双层石墨烯纳米带的 PIT 系统。 该系统使用两层交叉的石墨烯纳米带,每层纳米带同时作为 bright 模式和 dark 模式,实现了动态可调节的 PIT。这种方法不仅解决了极化方向的问题,也简化了设备设计。 在该系统中,两层纳米带的耦合可以产生两种耦合方式:一条 bright 模式和一条 dark 模式的耦合,或者两条 bright 模式的耦合。这种耦合方式可以导致 PIT 的出现,从而实现电磁波的透明。 该系统的优点在于可以实现动态可调节的 PIT,不依赖于极化方向,且设备设计相对简单。该技术有着广泛的应用前景,如隐身技术、光电器件和生物检测等。 本文讨论了基于双层石墨烯纳米带的 PIT 系统,该系统可以实现动态可调节的 PIT,且不依赖于极化方向。该技术有着广泛的应用前景,值得进一步的研究和开发。
2021-02-08 上传

润色下面英文:The controlled drug delivery systems, due to their precise control of drug release in spatiotemporal level triggered by specific stimulating factors and advantages such as higher utilization ratio of drug, less side-effects to normal tissues and so forth, provide a new strategy for the precise treatment of many serious diseases, especially tumors. The materials that constitute the controlled drug delivery systems are called “smart materials” and they can respond to the stimuli of some internal (pH, redox, enzymes, etc.) or external (temperature, electrical/magnetic, ultrasonic and optical, etc.) environments. Before and after the response to the specific stimulus, the composition or conformational of smart materials will be changed, damaging the original balance of the delivery systems and releasing the drug from the delivery systems. Amongst them, the photo-controlled drug delivery systems, which display drug release controlled by light, demonstrated extensive potential applications, and received wide attention from researchers. In recent years, photo-controlled drug delivery systems based on different photo-responsive groups have been designed and developed for precise photo-controlled release of drugs. Herein, in this review, we introduced four photo-responsive groups including photocleavage groups, photoisomerization groups, photo-induced rearrangement groups and photocrosslinking groups, and their different photo-responsive mechanisms. Firstly, the photocleavage groups represented by O-nitrobenzyl are able to absorb the energy of the photons, inducing the cleavage of some specific covalent bonds. Secondly, azobenzenes, as a kind of photoisomerization groups, are able to convert reversibly between the apolar trans form and the polar cis form upon different light irradiation. Thirdly, 2-diazo-1,2-naphthoquinone as the representative of the photo-induced rearrangement groups will absorb specific photon energy, carrying out Wolff rearrangement reaction. Finally, coumarin is a promising category photocrosslinking groups that can undergo [2+2] cycloaddition reactions under light irradiation. The research progress of photo-controlled drug delivery systems based on different photo-responsive mechanisms were mainly reviewed. Additionally, the existing problems and the future research perspectives of photo-controlled drug delivery systems were proposed.

2023-02-06 上传