Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 박희준 | - |
dc.date.accessioned | 2020-10-14T04:47:12Z | - |
dc.date.available | 2020-10-14T04:47:12Z | - |
dc.date.issued | 2019-10 | - |
dc.identifier.citation | APPLIED PHYSICS LETTERS, v. 115, no. 15, article no. 154103 | en_US |
dc.identifier.issn | 0003-6951 | - |
dc.identifier.issn | 1077-3118 | - |
dc.identifier.uri | https://aip.scitation.org/doi/10.1063/1.5106415 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/154572 | - |
dc.description.abstract | Previous laser-generated focused ultrasound (LGFU) systems have been operated with ˃15 MHz frequency, allowing for high spatial precision (mu m). However, they have been limited only to proximal biomedical applications ex vivo with treatment depths smaller than 10 mm from the lens surface. Although the low-megahertz frequency operation has the advantage of a longer range of therapy, this requires a proper photoacoustic lens made of a nanocomposite coating over a spherically curved substrate whose transmission layer is physically designed for frequency-tuned outputs. This demands a fabrication method that can provide such a nanocomposite structure. We demonstrate photoacoustic lenses operated in an unexplored frequency range of 1-10 MHz, which can simultaneously produce high-amplitude pressure outputs sufficient for pulsed acoustic cavitation. We physically design a spatially elongated photoacoustic output and then fabricate a transmitter by controlling the density of light-absorbing nanoscale elements in a solution form and by using a replica mold to shape the lens curvature. Our approach is validated by fabricating and characterizing planar transmitters and then applied to focal configurations. This offers various possibilities for LGFU-based treatments (e.g., pulsed cavitational therapy such as histotripsy) over the low-megahertz frequency range, which has not been realized by conventional LGFU systems. | en_US |
dc.description.sponsorship | H.W.B. acknowledges the support from the Ministry of Science and ICT, Korea, under the Information Technology Research Center support program (No. IITP-2019-2018-0-01798) supervised by the Institute for Information and Communications Technology Promotion, and also from the Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education (No. NRF-2017R1D1A1B03035925). This work was also supported by "Human Resources Program in Energy Technology" of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from Ministry of Trade, Industry & Energy, Republic of Korea (20184030202220). | en_US |
dc.language.iso | en | en_US |
dc.publisher | AMER INST PHYSICS | en_US |
dc.title | Laser-generated focused ultrasound transmitters with frequency-tuned outputs over sub-10-MHz range | en_US |
dc.type | Article | en_US |
dc.relation.no | 15 | - |
dc.relation.volume | 115 | - |
dc.identifier.doi | 10.1063/1.5106415 | - |
dc.relation.page | 154103-154103 | - |
dc.relation.journal | APPLIED PHYSICS LETTERS | - |
dc.contributor.googleauthor | Joo, Min Gyu | - |
dc.contributor.googleauthor | Lee, Kyu-Tae | - |
dc.contributor.googleauthor | Sang, Pilgyu | - |
dc.contributor.googleauthor | Heo, Jeongmin | - |
dc.contributor.googleauthor | Park, Hui Joon | - |
dc.contributor.googleauthor | Baac, Hyoung Won | - |
dc.relation.code | 2019000399 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF ORGANIC AND NANO ENGINEERING | - |
dc.identifier.pid | huijoon | - |
dc.identifier.researcherID | AAS-5243-2020 | - |
dc.identifier.orcid | https://orcid.org/0000-0003-4607-207X | - |
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