Controllably tuning the near-infrared plasmonic modes of gold nanoplates for enhanced optical coherence imaging and photothermal therapy

Jiang, Xueqin; Liu, Renming; Tang, Ping; Li, Wanbo; Zhong, Huixiang; Zhou, Zhang‐Kai; Zhou, Jianhua

doi:10.1039/c5ra15204f

Cited by 28 publications

(26 citation statements)

References 43 publications

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“…This widening was attributed to coalescence . However, in the case with a graphene template, the peak surprisingly shifted all the way to the NIR region, specifically to 986 nm, revealing the formation of a high‐aspect‐ratio nanoplatelet on the graphene template . Though a similar effect has been previously reported in a solution process, LSPR characteristics from such a nanoplatelet grown on a graphene template exclusively can be used in surface‐sensitive applications because the surface of the nanoplatelet was purely metal without any chemical stabilizer and residue that are essential for the solution synthesis of nanocrystals.…”

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confidence: 57%

Ultrathin Metal Crystals: Growth on Supported Graphene Surfaces and Applications

Chae

Jang

Lee

et al. 2018

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Controlled nucleation and growth of metal clusters in metal deposition processes is a long-standing issue for thin-film-based electronic devices. When metal atoms are deposited on solid surfaces, unintended defects sites always lead to a heterogeneous nucleation, resulting in a spatially nonuniform nucleation with irregular growth rates for individual nuclei, resulting in a rough film that requires a thicker film to be deposited to reach the percolation threshold. In the present study, it is shown that substrate-supported graphene promotes the lateral 2D growth of metal atoms on the graphene. Transmission electron microscopy reveals that 2D metallic single crystals are grown epitaxially on supported graphene surfaces while a pristine graphene layer hardly yields any metal nucleation. A surface energy barrier calculation based on density functional theory predicts a suppression of diffusion of metal atoms on electronically perturbed graphene (supported graphene). 2D single Au crystals grown on supported graphene surfaces exhibit unusual near-infrared plasmonic resonance, and the unique 2D growth of metal crystals and self-healing nature of graphene lead to the formation of ultrathin, semitransparent, and biodegradable metallic thin films that could be utilized in various biomedical applications.

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confidence: 57%

Ultrathin Metal Crystals: Growth on Supported Graphene Surfaces and Applications

Chae

Jang

Lee

et al. 2018

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“…PTAs having imaging modalities can monitor the accumulation of NPs in tumours in real-time after systemic administration and provide guidance to PTT, which is called imaging-guided therapy. 33,207 Many imaging modalities, such as positron emission tomography (PET), [208][209][210] single photon emission computed tomography (SPECT), 211 MRI, [212][213][214] fluorescence imaging, 55,215 afterglow luminescence imaging, 216 PAI, 217 ultrasound imaging, 27,99,218 OCT, 219 and CT, 220,221 have been combined with PTAs to assist the conduction of therapies. 222 In some cases, multiple imaging modalities have been combined to provide more information for tumour diagnosis and therapy monitoring.…”

Section: -2 Determining the Best Treatment Windowmentioning

confidence: 99%

“…Other imaging techniques, such as OCT, ultrasound imaging or CT, have also been used to guide the PTT. 27,99,218,219,[243][244][245] Each imaging technique has its own pros and cons. For example, MRI is mainly used for soft tissues, but its resolution is lower than CT.…”

Section: -2-3 Mri-guided Ptt-mrimentioning

confidence: 99%

Photothermal therapy and photoacoustic imaging via nanotheranostics in fighting cancer

et al. 2019

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“…Another approach is to shorten the flexible portion of the ligands to allow for higher density of AuNPs, which would also compensate for the excitation power changes. The second, tuning the LSPR to longer wavelengths, is a more complex task 58 , 59 , and the most well suited Au nanostructures would be hollow nanoparticles where the resonance is shifted by altering shell diameter and thickness 60 . This functionality would add considerable versatility to utilizing these shells in vivo , since NIR radiation is capable of deeper tissue penetration compared to visible wavelengths.…”

Section: Discussionmentioning

confidence: 99%

Plasmon-actuated nano-assembled microshells

Quint

Sarang

Quint

et al. 2017

Sci Rep

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We present three-dimensional microshells formed by self-assembly of densely-packed 5 nm gold nanoparticles (AuNPs). Surface functionalization of the AuNPs with custom-designed mesogenic molecules drives the formation of a stable and rigid shell wall, and these unique structures allow encapsulation of cargo that can be contained, virtually leakage-free, over several months. Further, by leveraging the plasmonic response of AuNPs, we can rupture the microshells using optical excitation with ultralow power (<2 mW), controllably and rapidly releasing the encapsulated contents in less than 5 s. The optimal AuNP packing in the wall, moderated by the custom ligands and verified using small angle x-ray spectroscopy, allows us to calculate the heat released in this process, and to simulate the temperature increase originating from the photothermal heating, with great accuracy. Atypically, we find the local heating does not cause a rise of more than 50 °C, which addresses a major shortcoming in plasmon actuated cargo delivery systems. This combination of spectral selectivity, low power requirements, low heat production, and fast release times, along with the versatility in terms of identity of the enclosed cargo, makes these hierarchical microshells suitable for wide-ranging applications, including biological ones.

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Controllably tuning the near-infrared plasmonic modes of gold nanoplates for enhanced optical coherence imaging and photothermal therapy

Abstract: Ozone can be used to precisely tailor the plasmon mode of gold triangular nanoprism for enhancing optical imaging and therapy.

Cited by 28 publications

References 43 publications

Ultrathin Metal Crystals: Growth on Supported Graphene Surfaces and Applications

Ultrathin Metal Crystals: Growth on Supported Graphene Surfaces and Applications

Photothermal therapy and photoacoustic imaging via nanotheranostics in fighting cancer

Plasmon-actuated nano-assembled microshells

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