表面增强拉曼散射(SERS)和尖端增强拉曼散射(TERS)开辟了各种令人兴奋的研究领域。然而,尽管自从这两种技术首次被报道以来已经提出了大量的应用,但没有一个被应用于真正的实际使用。这就需要更新最近的 SERS 和 TERS 基础和应用研究。因此,本次综述的目标和范围是报告SERS和TERS的新方向和新视角,主要从结合其机制和应用研究的角度出发。关于SERS和TERS的最新进展,本文讨论了四个主要主题:(1)SERS的纳米到亚纳米等离子体热点; (2) Ångström 解决了 TERS; (3)化学机制,即SERS的电荷转移机制和半导体增强拉曼散射; (4)在机制研究和应用之间建立牢固的桥梁。
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Toward a New Era of SERS and TERS at the Nanometer Scale: From Fundamentals to Innovative Applications
Surface-enhanced Raman scattering (SERS) and tip-enhanced Raman scattering (TERS) have opened a variety of exciting research fields. However, although a vast number of applications have been proposed since the two techniques were first reported, none has been applied to real practical use. This calls for an update in the recent fundamental and application studies of SERS and TERS. Thus, the goals and scope of this review are to report new directions and perspectives of SERS and TERS, mainly from the viewpoint of combining their mechanism and application studies. Regarding the recent progress in SERS and TERS, this review discusses four main topics: (1) nanometer to subnanometer plasmonic hotspots for SERS; (2) Ångström resolved TERS; (3) chemical mechanisms, i.e., charge-transfer mechanism of SERS and semiconductor-enhanced Raman scattering; and (4) the creation of a strong bridge between the mechanism studies and applications.