Photothermal Generation of Programmable Microbubble Array on Nanoporous Gold Disks

Li, Jingting; Zhao, Fei; Shih, Wei-Chuan

doi:10.1109/omn.2018.8454630

Cited by 3 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An imaging speed of 100 fps was used to capture the onset of microbubble formation (<10 m), which was not possible previously ( Fig. 2) [10]. The laser was set to focus on the surface of the NPGD array in order to achieve maximum absorption for microbubble generation, while a 4f imaging system was used to image roughly 5 µm above the surface to clearly image the microbubble growth dynamics.…”

Section: Resultsmentioning

confidence: 99%

“…Microbubble initiation occurs through a mechanism called explosive expansion of superheated liquids where vaporization and dissolved gas in the medium combine and form the bubble [9]. Degassed water is still capable of photothermal microbubble generation, however the overall saturated bubble is reduced in size [10]. Using a plasmonic substrate as the light absorber to generate microbubbles has considerably reduced the necessary laser power to generate a plasmonic microbubble and successfully assembled micro-and nanoparticles for on-chip sensing devices [11].…”

Section: Introductionmentioning

confidence: 99%

“…The semirandom porous network has a characteristic length of 5-15 nm and has been shown to provide significant plasmonic field localization. NPGD array has been demonstrated to be highly effective in surface-enhanced Raman spectroscopy [31], surface-enhanced fluorescence [32], surface-enhanced near infrared absorption [13], plasmon-enhanced heterogeneous catalysis [33], and photothermal heating [10,34,35]. Thanks to the highly tunable LSPR of the NPGD array, microbubble of controlled size can be generated by near-infrared (NIR) light.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we reported the generation of microbubbles on NPGD using 785 nm laser output with holographically generated patterns. We investigated the dynamics of microbubble formation and disappearance with respect to laser power and degassing conditions [10]. However, the onset of the microbubble formation was not available due to imaging speed limit.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Directed assembly and concentrating of micro/nanoparticles, cells, and vesicles via low-power near-infrared laser generated plasmonic microbubbles

Ohannesian¹,

Li²,

Misbah³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

Directed assembly and concentrating of micro-and nanoparticles via laser generated plasmonic microbubbles in a liquid environment is an emerging technology. For effective heating, visible light has been primarily employed in existing demonstrations. In this paper, we demonstrate a new plasmonic platform based on nanoporous gold disk (NPGD) array. Thanks to the highly tunable localized surface plasmon resonance of the NPGD array, microbubble of controlled size can be generated by near-infrared (NIR) light. Using NIR light provides several key advantages over visible light in less interference with standard microscopy and fluorescence imaging, preventing fluorescence photobleaching, less susceptible to absorption and scattering in turbid biological media, and much reduced photochemistry, phototoxicity and whatsoever. The large surface-to-volume ratio of NPGD further facilitates the heat transfer from these gold nanoheaters to the surroundings, achieving unprecedented low-power operation. While the microbubble is formed, the surrounding liquid circulates and direct microparticles randomly dispersed in the liquid to the bottom NPGD surface, yielding unique assemblies of microstructures. Such capability can also be employed in concentrating suspended colloidal nanoparticles at desirable sites and with preferred configuration, both enhancing the sensor performance. In addition to various micro-and nanoparticles, the plasmonic microbubbles are also shown to collect biological cells and nanovesicles. By using a spatial light modulator (SLM) to project the laser in arbitrary patterns, parallel assembly can be achieved to fabricate an array of clusters. These assemblies have been characterized using optical microscopy, scanning electron microscope, hyperspectral localized surface plasmon resonance imaging and hyperspectral Raman imaging.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Directed assembly and concentrating of micro/nanoparticles, cells, and vesicles via low-power near-infrared laser generated plasmonic microbubbles

Ohannesian¹,

Li²,

Misbah³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Optothermal actuation allows the parallel actuation of many microrobots, as demonstrated by optothermocapillary flow-addressed bubble (OFB) microrobots. The OFB microrobots are gas bubbles in a liquid that move along optically generated thermal gradients [33], [59], [60]. As the OFB microrobots are optically addressed, the uncoupled actuation of individual microrobots can be achieved, even when moving many microrobots at once.…”

Section: A Increasing Throughput Of Micromanipulationmentioning

confidence: 99%

Micromanipulation With Microrobots

Rahman

Ohta

2021

IEEE Open J. Nanotechnol.

View full text Add to dashboard Cite

show abstract

Nanoporous Metals: From Plasmonic Properties to Applications in Enhanced Spectroscopy and Photocatalysis

et al. 2021

Self Cite

View full text Add to dashboard Cite

The field of plasmonics is capable of enabling interesting applications in different wavelength ranges, spanning from the ultraviolet up to the infrared. The choice of plasmonic material and how the material is nanostructured has significant implications for ultimate performance of any plasmonic device. Artificially designed nanoporous metals (NPMs) have interesting material properties including large specific surface area, distinctive optical properties, high electrical conductivity, and reduced stiffness, implying their potentials for many applications. This paper reviews the wide range of available nanoporous metals (such as Au, Ag, Cu, Al, Mg, and Pt), mainly focusing on their properties as plasmonic materials. While extensive reports on the use and characterization of NPMs exist, a detailed discussion on their connection with surface plasmons and enhanced spectroscopies as well as photocatalysis is missing. Here, we report on different metals investigated, from the most used nanoporous gold to mixed metal compounds, and discuss each of these plasmonic materials’ suitability for a range of structural design and applications. Finally, we discuss the potentials and limitations of the traditional and alternative plasmonic materials for applications in enhanced spectroscopy and photocatalysis.

show abstract

Photothermal Generation of Programmable Microbubble Array on Nanoporous Gold Disks

Cited by 3 publications

References 0 publications

Directed assembly and concentrating of micro/nanoparticles, cells, and vesicles via low-power near-infrared laser generated plasmonic microbubbles

Directed assembly and concentrating of micro/nanoparticles, cells, and vesicles via low-power near-infrared laser generated plasmonic microbubbles

Micromanipulation With Microrobots

Nanoporous Metals: From Plasmonic Properties to Applications in Enhanced Spectroscopy and Photocatalysis

Contact Info

Product

Resources

About