Optical Trapping of a Single Molecule of Length Sub-1 nm in Solution

Zeng, Biao-Feng; Deng, Ran; Zou, Yuling; Huo, Chun-An; Wang, Jingyu; Yang, Wei; Liang, Qing-Man; Qiu, Shengjie; Feng, Anni; Song, Jia; Hong, Wenjing; Yang, Zhou; Zhang, Tian; Yang, Yang

doi:10.31635/ccschem.022.202202318

Cited by 12 publications

(5 citation statements)

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“…By producing an intense and highly localized electromagnetic field, localized surface plasmons (LSPs) can amplify electrical charge transport in devices where the incident light triggers LSPs in nanogap antennas. , Nanogap antennas in various realizations have attracted high interest in recent years to confine light, harvest energy, and produce photoinduced current. Adaptable functionalities with corresponding LSP-based structures encompass a broad range of applications, such as surface-enhanced sensing, nanolight sources, molecular trapping, and optoelectronic switches . The illuminating electromagnetic field in nanoparticle (NP)-based antennas is enhanced in gaps and junctions between the NPs and induces LSP oscillations, which represent alternating LSP currents.…”

Section: Introductionmentioning

confidence: 99%

Tuning and Modulation of the Photoinduced Current by Rectification of Surface Plasmons in Metal–Molecule–Nanoparticle–ITO Composite Junctions

Wang,

Barth,

Snegir

et al. 2024

J. Phys. Chem. C

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Au nanoparticles (AuNPs) are prime candidates to build up device components for light-harvesting and photon− electron conversion. AuNPs respond to light irradiation by creating localized surface plasmons (LSPs), coupling with neighboring AuNPs and the substrate, to generate intense fields. Here, we present a novel optoelectronic multilayer heterostructure to transmit the LSP response directly into alternating current (AC) on the tens of nanoampere level under modulated laser illumination in the hundred kilohertz range. The device is composed of a metal bottom layer, a self-assembled molecular monolayer (SAM), AuNPs, and indium tin oxide (ITO) as the transparent top layer. We show that ITO is a suitable material for the top electrode of the device because of its higher optical transparency for a given thickness, and we discuss the optoelectronic properties of the heterostructure. Furthermore, we show that the AC response can be tuned by a direct current (DC) bias, the illumination power, and wavelength, and we study the position dependencies of the LSP signal, thereby illustrating the multiple controllability of the heterostructure device. The investigation presents a novel device concept and contributes to future nanoscale applications in fundamental research, sensing, and energy harvesting based on the AC optoelectronic response. The novel design of the heterostructure could also lead to possible approaches for AC optoelectric converter applications.

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Section: Introductionmentioning

confidence: 99%

Tuning and Modulation of the Photoinduced Current by Rectification of Surface Plasmons in Metal–Molecule–Nanoparticle–ITO Composite Junctions

Wang,

Barth,

Snegir

et al. 2024

J. Phys. Chem. C

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“…Optical tweezers, proposed by Ashkin in 1986, offer a contactless, non-invasive and high-precision technique for trapping and manipulating tiny entities in three-dimensional space [1]. This breakthrough has catalyzed extensive research efforts in the realms of biology, physics, and micro-nano optics [2][3][4][5][6][7][8]. Generally, the accurate trapping of mirco-nano particles usually relies on the gradient and scattering forces exerted by light beams, with the former linked to the intensity gradient of light and the latter associated with the Poynting vector [9].…”

Section: Introductionmentioning

confidence: 99%

Switchable optical trapping and manipulation enabled by polarization-modulated multifunctional phase-change metasurfaces

Xu,

Tian,

et al. 2024

J. Phys. D: Appl. Phys.

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Optical trapping, a cutting-edge methodology, is pivotal for contactlessly controlling and exploring microscopic objects. However, it encounters formidable challenges such as multiparticle trapping, flexible control, and seamless integration. Here, we employ a polarization-modulated multi-foci technique for versatile nanoparticle trapping using multifunctional metasurfaces relying on geometric phase. Numerical simulations demonstrate the generation of two focused spots with orthogonal polarization distributions through our metasurfaces when illuminated with linearly polarized light, with their polarization distributions be interchanged by orthogonally switching the incident polarizations. We extend this design to an array of multi-foci metasurface tweezers modulated by polarization, highlighting the versatility and robustness of our approach. Furthermore, we demonstrate the simultaneous generation of two distinct focusing cylindrical vector beams using a monolayer metasurface, showcasing the two vector beams possess the interchange ability of their polarization distributions. By leveraging the Maxwell stress tensor, we assess the distinct contributions of the focused beams to longitudinal and transverse optical forces on SiO2 spheres, validating diverse trapping and manipulation behaviors for nanoparticles with the proposed metasurface designs. By manipulating the phase states of Sb2S3 nanopillars, binary-switchable optical trapping and manipulation are facilitated for for all proposed metasurface tweezers. Our work underscores the efficacy of polarization-modulation multifunctional metasurface tweezers in consolidating multiple trapping tasks into a single device, paving the way for innovative lab-on-a-chip optical trapping applications in biophysics, nanotechnology, and photonics.

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“…[ 9 ] Optical manipulation offers several unique benefits in the study of soft matter. One of the most critical advantages is its ability to achieve multi‐scale control, from molecules at the nanoscale (recent research has even achieved sub‐nanometer scale manipulation [ 10 ] ) to micro‐scale particles and macroscopic biological tissues and polymer materials. [ 11 ] In addition to its advantages of spatial and temporal precision, optical manipulation can efficiently initiate energy‐dependent chemical reactions due to the high energy of photons, capable of overcoming activation barriers.…”

Section: Introductionmentioning

confidence: 99%

Optical Manipulation of Soft Matter

Chen,

Zhao,

Zhang

et al. 2023

Small Methods

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Optical manipulation has emerged as a pivotal tool in soft matter research, offering superior applicability, spatiotemporal precision, and manipulation capabilities compared to conventional methods. Here, an overview of the optical mechanisms governing the interaction between light and soft matter materials during manipulation is provided. The distinct characteristics exhibited by various soft matter materials, including liquid crystals, polymers, colloids, amphiphiles, thin liquid films, and biological soft materials are highlighted, and elucidate their fundamental response characteristics to optical manipulation techniques. This knowledge serves as a foundation for designing effective strategies for soft matter manipulation. Moreover, the diverse range of applications and future prospects that arise from the synergistic collaboration between optical manipulation and soft matter materials in emerging fields are explored.

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Optical Trapping of a Single Molecule of Length Sub-1 nm in Solution

Cited by 12 publications

References 0 publications

Tuning and Modulation of the Photoinduced Current by Rectification of Surface Plasmons in Metal–Molecule–Nanoparticle–ITO Composite Junctions

Tuning and Modulation of the Photoinduced Current by Rectification of Surface Plasmons in Metal–Molecule–Nanoparticle–ITO Composite Junctions

Switchable optical trapping and manipulation enabled by polarization-modulated multifunctional phase-change metasurfaces

Optical Manipulation of Soft Matter

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