Optimizing the photothermal conversion performance of gold nanorods

IF 2.6 4区材料科学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of Nanoparticle Research Pub Date : 2025-01-28 DOI:10.1007/s11051-025-06236-y

Guo-Wei Li, Hang-Yu Yan, Feng-Yuan Zhang, Run-Min Liu, Meng-Dai Luoshan, Li Zhou, Qu-Quan Wang

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Abstract

Highly uniform gold nanorods (GNRs) with tunable surface plasmon resonances (SPRs) across the visible and near-infrared (NIR) spectral regions exhibit attractive photothermal conversion properties along with their chemical stability, good dispersibility, and biocompatibility. In this study, we investigate the optimization of photothermal conversion utilizing GNRs as an agent under the laser excitation at 808 nm, within the NIR-I window. The aspect ratio of GNRs is tuned by the AgNO₃ amount in the reaction solution, and the characteristic longitudinal SPR is of 810 nm at the aspect ratio of 4.43, matching well with the laser wavelength. When the extinction intensity (located around 808 nm) of 810-nm GNR solution is adjusted to 1.0, the photothermal conversion efficiency is achieved to an optimal value of 36.1%, which is approximately 1.7 times that of the sample with the extinction intensity of 0.3. These findings offer insights for the design of effective photothermal conversion agents.

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优化金纳米棒的光热转换性能

高度均匀的金纳米棒（gnr）具有可调谐的表面等离子体共振（SPRs），在可见光和近红外（NIR）光谱区域具有吸引人的光热转换性能，以及它们的化学稳定性，良好的分散性和生物相容性。在本研究中，我们研究了在NIR-I窗口内，在808 nm激光激发下，利用gnr作为介质进行光热转换的优化。反应溶液中AgNO3的加入可调节GNRs的长径比，在长径比为4.43时，其特征纵向SPR为810 nm，与激光波长匹配良好。当810纳米GNR溶液的消光强度（808 nm左右）调整为1.0时，光热转换效率达到36.1%的最优值，约为消光强度为0.3样品的1.7倍。这些发现为设计有效的光热转化剂提供了新的思路。

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阿拉丁

Cetyltrimethylammonium bromide (CTAB)

来源期刊

Journal of Nanoparticle Research 工程技术-材料科学：综合

CiteScore

4.40

自引率

4.00%

发文量

198

审稿时长

3.9 months

期刊介绍： The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size. Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology. The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.