Fabrication of the Au Nano-Aperture Array Platform for Single Molecule Analysis

Choi, Seong Soo; Park, Myoung Jin; Lee, Yong Min; Bae, Byung Seong; Kim, Hyun Tae; Choi, Soo Bong

doi:10.1149/2162-8777/aba723

Cited by 4 publications

(6 citation statements)

References 26 publications

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“…The optical profile of sample a15, given in Figure 8(b), has a center point at 607.8 nm with broadband between ~524.8 nm and ~691.9 nm. Optical profile broadening with increased aperture size is agreeable with the previously published results [31,32]. The SPP-coupled intraband optical emission would increase with the decreasing aperture diameter and the increasing surface wave along the pyramidal surfaces emanated from the aperture on the pyramidal apex.…”

Section: Nanopores On Pyramids With ~10 2 Nm Aperture Sizessupporting

confidence: 91%

“…We also fabricated the nanoslit array with its opening width ranging from 100 nm to ~ 10 nm using 30 keV Ga FIB. The plasmonic effect from the nanoslit array is well known [29][30][31]. Nanoslit fabrication with an opening less than 50 nm is much easier than the circular-type aperture with a diameter of 50 nm or less.…”

Section: Resultsmentioning

confidence: 99%

“…Fabrication of plasmonic nanopore on a pyramid and nanoscale double slits is previously investigated [5][6][7][29][30][31]. It is reported that the light transmission through a conical type aperture is dependent on the polarization and aperture size for ka << 1, where k is the wave vector while a is the radius of the circular aperture [32,33].…”

Section: Introductionmentioning

confidence: 99%

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Toward Next Generation Plasmonic Nanopore Slit Platform with a ~10 nm Slit-Width

Choi¹,

Bae²,

Lee³

et al. 2021

RPM

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We fabricated various nanoaperture plasmonic platforms for single-molecule detection. We fabricated nanoapertures like nanopores on a pyramid and nanoslits on an Au flat membrane using a Ga ion focused ion beam drilling technique, followed by irradiating with a high energy electron beam, dependent on the electron beam current density to obtain nanoapertures with a few nanometer sizes (circular nanopore, nanoslit pores). We examined their optical characteristics with varying aperture sizes and sample thicknesses. We obtained broad emission spectra in the visible and infrared region from the (7 x 7) slit array and a sharp, strong infrared emission peak from the Au nanoparticle on the substrate. The fabricated Au platform with ~10 nm nanometer opening can be employed as a single-molecule sensor and an infrared thermal emission device.

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Section: Nanopores On Pyramids With ~10 2 Nm Aperture Sizessupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toward Next Generation Plasmonic Nanopore Slit Platform with a ~10 nm Slit-Width

Choi¹,

Bae²,

Lee³

et al. 2021

RPM

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“…Fabrication of plasmonic nano-pore on pyramid and double nanoscale double slits is previously examined [5,6,[20][21][22]. Light transmission through the conical type aperture dependent upon the polarization and aperture size for ka << 1 is well documented, where k is the wave vector and a is the radius of the circular aperture [23,24].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Various Plasmonic Nano-aperture Platforms with a ~10 nm Width

Choi¹,

Kim²,

Park³

et al. 2020

Preprint

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We fabricated the nano-aperture plasmonic platforms for single molecule detection and other various applications such as infrared thermal emission device. The nano-apertures including the nanopores on the pyramid, and the nano-slits on the Au flat membrane were fabricated using a Ga ion focused ion beam drilling technique, followed by high energy electron beam irradiations dependent upon the electron beam current density. The nanopores with a few nanometer size and the nanoslit array with order of ~ 100 nm width were fabricated. Optical characteristics for the various nanoslits were examined dependent upon the slit opening width and sample thickness. The broad emission spectra from the (7x 7) slit array are obtained from spp-mediated emission in the visible and infrared region. A sharp strong infrared emission peak is also obtained due to Au nanoparticle. The fabricated Au platform can be utilized as single molecule sensor and infrared thermal emission device.

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“…Manipulation of micro- or nano-objects, such as plasmonic nanoparticles, biological cells, or viruses, is of significant importance for biomedical or physical applications, such as micro/nano-fabrication, − particle and/or cell sorting, − single-cell analysis, − or even single molecular and atom level operations. − In the past few decades, different methods have been proposed and developed to meet all kinds of application scenarios, including electrokinetic, , magnetic, − hydrodynamic, , and optical − forces. Particularly, the optical tweezer is one of the most promising techniques that can be used for the manipulation of micro- or nano-objects, for which Arthur Ashkin has been awarded the Nobel Prize in physics in 2018.…”

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confidence: 99%

Plasmonic Optical Tweezers for Particle Manipulation: Principles, Methods, and Applications

Ren

Chen

et al. 2021

ACS Nano

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Inspired by the idea of combining conventional optical tweezers with plasmonic nanostructures, a technique named plasmonic optical tweezers (POT) has been widely explored from fundamental principles to applications. With the ability to break the diffraction barrier and enhance the localized electromagnetic field, POT techniques are especially effective for high spatial-resolution manipulation of nanoscale or even subnanoscale objects, from small bioparticles to atoms. In addition, POT can be easily integrated with other techniques such as lab-on-chip devices, which results in a very promising alternative technique for high-throughput single-bioparticle sensing or imaging. Despite its label-free, high-precision, and high-spatial-resolution nature, it also suffers from some limitations. One of the main obstacles is that the plasmonic nanostructures are located over the surfaces of a substrate, which makes the manipulation of bioparticles turn from a three-dimensional problem to a nearly two-dimensional problem. Meanwhile, the operation zone is limited to a predefined area. Therefore, the target objects must be delivered to the operation zone near the plasmonic structures. This review summarizes the state-of-the-art target delivery methods for the POT-based particle manipulating technique, along with its applications in single-bioparticle analysis/imaging, high-throughput bioparticle purifying, and single-atom manipulation. Future developmental perspectives of POT techniques are also discussed.

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Fabrication of the Au Nano-Aperture Array Platform for Single Molecule Analysis

Cited by 4 publications

References 26 publications

Toward Next Generation Plasmonic Nanopore Slit Platform with a ~10 nm Slit-Width

Toward Next Generation Plasmonic Nanopore Slit Platform with a ~10 nm Slit-Width

Fabrication of Various Plasmonic Nano-aperture Platforms with a ~10 nm Width

Plasmonic Optical Tweezers for Particle Manipulation: Principles, Methods, and Applications

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