Three-Dimensional Assembly of Nanoparticles from Charged Aerosols

Lee, Hee Chul; You, Sukbeom; Pikhitsa, Peter V.; Kim, Junhoi; Kwon, Sunghoon; Woo, Chang Gyu; Choi, Mansoo

doi:10.1021/nl103787k

Cited by 100 publications

(92 citation statements)

References 29 publications

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“…Introduction of the antenna concept into the optical near infrared and terahertz frequency regime holds promise for a wide range of novel applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] including photo-detection [2,3], sensing [4], heat transfer [5,6], and spectroscopy [16].…”

Section: Introductionmentioning

confidence: 99%

“…Although designing microwave antennas has a rich literature, developing optical antennas has just started recently due to their challenging fabrication which requires nano-technology [11,13]. Due to the very different behavior of metals at optical frequencies, with respect to the behavior of their counterpart at radio-band and microwave frequencies, a nano-antenna operating at optical frequencies is not a simple downscaled version of a microwave antenna.…”

Section: Introductionmentioning

confidence: 99%

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Highly Directive Hybrid Plasmonic Leaky Wave Optical Nano-Antenna

Yousefi¹

2014

PIER Letters

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Abstract-A novel traveling-wave hybrid plasmonic optical antenna is proposed for operation at the standard telecommunication wavelength of 1550 nm and with the frequency bandwidth of more than 16 THz. A highly directive radiation pattern with 15.2 dBi directivity and 82% efficiency is achieved. The developed antenna benefits from high directivity advantage of leaky-wave antennas, and low loss properties and confinement of hybrid plasmonic structures. The designed device can have applications in inter/intera chip optical interconnect, and absorption enhancement of photodetectors, and solar cells.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Directive Hybrid Plasmonic Leaky Wave Optical Nano-Antenna

Yousefi¹

2014

PIER Letters

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“…Moreover, the scale of nanoparticle printing and ion beam milling must be regulated for inter-compatibility. [26] (d) Nanopottery fabricated using electrospinning [27] Forming/molding/ self-assembly, etc.…”

Section: Micro Contact Printingmentioning

confidence: 99%

Hybrid 3D printing by bridging micro/nano processes

Yoon

Jang

Kim

et al. 2017

J. Micromech. Microeng.

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The aim of this work was to develop a novel hybrid manufacturing method for nanoscale three-dimensional (3D) printing with multi-material capabilities. 3D structuring methods at the micro/nanoscale are major goals of various engineering fields, and much work has been carried out to improve the minimum feature size, geometrical complexity, and material selection. With the aim of nanoscale multimaterial printing, a hybrid process was reported with an integrated nanoparticle deposition system (NPDS) and focused ion beam (FIB) system; however this process has limitations in terms of surface roughness and control over the layer thickness, as well as with the process scale, and furthermore, lack of sacrificial layers.In this dissertation, a novel hybrid process is described, which combines aerodynamically focused nanoparticle (AFN) printing, micro-machining and focused ion beam (FIB) milling. AFN printing is based on NPDS, and micromachining was used for local planarization. In addition to these processes, spincoating was used to fabricate sacrificial layers. By bridging these different II micro/nanoscale processes, the resulting hybrid process can address the limitations of the individual processes.To create the hybrid process, each process was investigated to enable compatibility. With the AFN printing system, the surface morphology of a detached substrate was observed, and the bonding mechanism between the substrate and nanoparticles was investigated. A novel printing strategy was identified to reduce the scale of the process. With the micro-machining system, different tool geometries were investigated. Complex geometries inspired by conventional-scale tools were implemented on the micro-scale, and their effects were investigated. With the FIB system, material re-deposition phenomena were investigated to reduce defects that occur during ion sputtering. A novel path-generation strategy was identified and investigated for different scanning paths.Process capability is discussed using fabrication examples and functional applications. The novel hybrid process represents a significant advance in the state of the art, and enables far improved process scales or dimensional degree of freedom, without losing the advantages of broad choice of materials.3D-pinted micro bi-material cantilevers were fabricated as a thermal actuator.The mechanical and thermal properties of the structure were investigated using an in-situ measurement system, and irregular thermal phenomena were analyzed. It is expected that these in-situ measurements of the 3D printed microstructure will contribute to materials research.Various 3D structures can be fabricated using the process described here from a range of metal/ceramic inorganic materials, including polymers. In particular, it is expected that the process will contribute to the area of customized nanoscale structuring, with potential applications in medical treatments. It is also expected that this work will contribute to further improvements in manufacturing technology by combining different m...

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“…Surface enhanced Raman scattering (SERS) device provided by IAAL was also demonstrated 93) . SERS substrates fabricated based on three-dimensional nanoparticle structures by utilizing IAAL showed much increased signals compared to two-dimensional cases.…”

Section: Applicationsmentioning

confidence: 99%