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Kim, Ki Moon
복잡계 자기조립 연구단
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Colloidal Porous AuAg Alloyed Nanoparticles for Enhanced Photoacoustic Imaging

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Title
Colloidal Porous AuAg Alloyed Nanoparticles for Enhanced Photoacoustic Imaging
Author(s)
Lee, Woo Jin; Park, Eun-Yeong; Choi, Doowon; Lee, Donghyun; Koo, Jaehyoung; Min, Jung Gi; Jung, Yebin; Hong, Suk Bong; Kimoon Kim; Kim, Chulhong; Kim, Sungjee
Subject
gold−silver alloy, ; photoacoustic imaging probe, ; porous nanoparticle, ; signal enhancement, ; silica-coated nanoparticle
Publication Date
2020-07
Journal
ACS APPLIED MATERIALS & INTERFACES, v.12, no.29, pp.32270 - 32277
Publisher
AMER CHEMICAL SOC
Abstract
© 2020 American Chemical Society. Colloidal porous AuAg alloyed nanoparticles (pAuAgNPs) were synthesized by galvanic replacement reaction from Ag nanocubes. pAuAgNPs have a 50 nm exterior diameter and half of their inner space consists of voids that have a bimodal size distribution with peaks at 21 and 8.3 nm. pAuAgNPs showed a plasmonic peak at 750 nm, which was exploited for photoacoustic (PA) imaging. Gold nanorods (AuNRs) were prepared and used as the control; they have a strong plasmonic peak at 720 nm. In in vitro experiments at respective plasmonic peak excitations, pAuAgNPs gave stronger PA signals than AuNRs by 8.9 times per particle and 11.7 times per dosage by exogenous atom. The high surface area per volume as a result of the inner voids amplified the PA signals by efficient thermoacoustic conversion. In experiments of chicken-tissue phantoms, pAuAgNPs showed PA signals through 4.5 cm thick tissue, whereas AuNRs gave no detectable signal. In whole-body in vivo experiments, pAuAgNPs injected into the body showed 2.7 times stronger PA signals than AuNRs. Coating the pAuAgNPs with a silica layer additionally increased their PA signal by 1.8 times when compared to the uncoated ones
URI
https://pr.ibs.re.kr/handle/8788114/7768
DOI
10.1021/acsami.0c05650
ISSN
1944-8244
Appears in Collections:
Center for Self-assembly and Complexity(복잡계 자기조립 연구단) > 1. Journal Papers (저널논문)
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