Environment-dependent generation of photoacoustic waves from plasmonic nanoparticles.
Environment-dependent generation of photoacoustic waves from plasmonic nanoparticles.
复制标题
来自等离子体纳米颗粒的光声波的环境依赖性产生。
DOI：
10.1002/smll.201101140
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发表时间：
2012-01-09
期刊：
影响因子：
13.3
通讯作者：
Emelianov, Stanislav
中科院分区：
文献类型：
--
作者：
Chen, Yun-Sheng;Frey, Wolfgang;Aglyamov, Salavat;Emelianov, Stanislav
关键词：
自从贝尔发现光声或光声效应以来，光声或光声效应经历了两次重大的复兴。[1]第一次转换是由激光和压电换能器促成的，创造了一种超灵敏的光谱技术来表征体相、粉末和表面膜形式的气体、液体和固体材料的吸收特性。[2-3]它还非常有助于表征光诱导化学反应、化学、热和结构传感、[5]或双光子吸收截面的表征。[6]许多作者发展了对各种实验情况的理论描述，最近，在生物医学成像和图像引导治疗的推动下，第二种新的兴趣已经发展起来，尽管光声技术更早地被用于生命科学。[13]这种复兴是基于层析成像技术、[14-19]和使用高吸收纳米结构用于生物医学成像的分子传感策略的发展。[20-24]用于散射或非辐射样品的光声技术的优势在于，被检测的不是光，而是具有更长波长的声音。虽然基于纳米颗粒的光声学与迄今为止发展起来的许多形式的光声学并没有根本的不同，但纳米颗粒的小体积引入了新的现象，反映了这些系统中表面效应的主导地位。这篇论文的目的是证明在许多情况下，光声响应不是来自纳米尺寸的吸收体，而是非常低吸收的周围材料，因此
The photoacoustic or optoacoustic effect has seen two major renaissances since its discovery by Bell.[1] The first transformation was facilitated by lasers and piezoelectric transducers to create an ultra-sensitive spectroscopy technique to characterize the absorptive properties of gaseous, liquid, and solid materials in the form of bulk, powders and surface films.[2–3] It has also been very helpful in characterizing photo-induced chemical reactions,[4] and in chemical, thermal, and structural sensing,[5] or in the characterization of two-photon absorption cross sections.[6] Theoretical descriptions of various experimental situations were developed by a number of authors,[7–10] and summarized for instance in.[11] More recently, a second renewed interest has developed motivated by biomedical imaging and imageguided therapy,[12] although photoacoustic techniques have been used in the life sciences earlier.[13] This renaissance is based on the development of tomographic techniques,[14–19] and molecular sensing strategies using highly absorbing nanostructures for biomedical imaging.[20–24] The strength of the photoacoustic technique for scattering or non-radiating samples lies in the fact that it is not light that is detected but sound, which has a much longer wavelength. Although nanoparticle based photoacoustics is not fundamentally different from the many forms of photoacoustics developed so far, the small volume of nanoparticles introduces new phenomena that reflect the dominance of surface effects in these systems. The goal of this paper is to show that in many situations the photoacoustic response is not from the nano-sized absorber but the very low-absorbing surrounding material and therefore
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影响因子：
3.2
作者：
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通讯作者：
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