Seed-Mediated Synthesis of Tunable-Aspect-Ratio Gold Nanorods for Near-Infrared Photoacoustic Imaging

Li, Pengwei; Wu, Yiduo; Li, Dingding; Su, Xiaoxiao; Luo, Cheng; Wang, Ying; Hu, Jie; Li, Gang; Jiang, Huabei; Zhang, Wendong

doi:10.1186/s11671-018-2734-8

Cited by 30 publications

(22 citation statements)

References 40 publications

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“…This proportion was measured to be roughly around -0.007/nm. This can be seen from works as Gu et al [ 54 ], who presented Au NR with resonances at 900 nm with a Q-factor of 5.5, to a Q-factor of 4.5 at 1000 nm, along works such as presented by Chen et al [ 162 ] with Q-factors of 3.8 at 1050 nm.…”

Section: Nanostructuresmentioning

confidence: 92%

“…Furthermore, this method can produce a wide variety of nanostructures exhibiting pronounced redshifts on the LSPR band towards the NIR, among these nanostructures of interest lie the elongated ellipsoid like nanostructures as nanorice, nanocarrots and the famous NRs, as well as, nanotriangles, nanocubes, nanoshells, and nanorings [ 54 , 55 , 56 , 57 ].…”

Section: Introductionmentioning

confidence: 99%

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Advances in Plasmonic Sensing at the NIR—A Review

Santos

Almeida

Pastoriza‐Santos

et al. 2021

Sensors

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Surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR) are among the most common and powerful label-free refractive index-based biosensing techniques available nowadays. Focusing on LSPR sensors, their performance is highly dependent on the size, shape, and nature of the nanomaterial employed. Indeed, the tailoring of those parameters allows the development of LSPR sensors with a tunable wavelength range between the ultra-violet (UV) and near infra-red (NIR). Furthermore, dealing with LSPR along optical fiber technology, with their low attenuation coefficients at NIR, allow for the possibility to create ultra-sensitive and long-range sensing networks to be deployed in a variety of both biological and chemical sensors. This work provides a detailed review of the key science underpinning such systems as well as recent progress in the development of several LSPR-based biosensors in the NIR wavelengths, including an overview of the LSPR phenomena along recent developments in the field of nanomaterials and nanostructure development towards NIR sensing. The review ends with a consideration of key advances in terms of nanostructure characteristics for LSPR sensing and prospects for future research and advances in this field.

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Section: Nanostructuresmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Advances in Plasmonic Sensing at the NIR—A Review

Santos

Almeida

Pastoriza‐Santos

et al. 2021

Sensors

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“…Metallic nanorods can be synthesized using a variety of methods [ 60 , 61 , 62 , 63 , 64 , 65 ]. In this work, we obtained AuNRs using the Nikoobakht method [ 66 ], with the suggestions reported in previous works [ 67 , 68 , 69 ].…”

Section: Methodsmentioning

confidence: 99%

Computational and Experimental Analysis of Gold Nanorods in Terms of Their Morphology: Spectral Absorption and Local Field Enhancement

et al. 2021

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A nanoparticle’s shape and size determine its optical properties. Nanorods are nanoparticles that have double absorption bands associated to surface plasmon oscillations along their two main axes. In this work, we analize the optical response of gold nanorods with numerical simulations and spectral absorption measurements to evaluate their local field enhancement—which is key for surface-enhanced Raman spectroscopic (SERS) applications. Our experimental results are in good agreement with finite element method (FEM) simulations for the spectral optical absorption of the nanoparticles. We also observed a strong dependence of the optical properties of gold nanorods on their geometrical dimension and shape. Our numerical simulations helped us reveal the importance of the nanorods’ morphology generated during the synthesis stage in the evaluation of absorption and local field enhancement. The application of these gold nanorods in surface-enhancement Raman spectroscopy is analyzed numerically, and results in a 5.8×104 amplification factor when comparing the values obtained for the nanorod deposited on a dielectric substrate compared to the nanorod immersed in water.

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“…The gold nanorods showed good biocompatibility and stability. The nanorods provided great contrast enhancement in PAI (3.1 times to the control group) and excellent signal-to-noise ratio (5.6 times to the control group) [ 111 ]. When administering Au NPs as a contrast agent in PAI, it is important to note that the Au NPs are below the renal clearance (10 nm).…”

Section: Medical Imagingmentioning

confidence: 99%

Application of Nanomaterials in Biomedical Imaging and Cancer Therapy

2020

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Nanomaterials, such as nanoparticles, nanorods, nanosphere, nanoshells, and nanostars, are very commonly used in biomedical imaging and cancer therapy. They make excellent drug carriers, imaging contrast agents, photothermal agents, photoacoustic agents, and radiation dose enhancers, among other applications. Recent advances in nanotechnology have led to the use of nanomaterials in many areas of functional imaging, cancer therapy, and synergistic combinational platforms. This review will systematically explore various applications of nanomaterials in biomedical imaging and cancer therapy. The medical imaging modalities include magnetic resonance imaging, computed tomography, positron emission tomography, single photon emission computerized tomography, optical imaging, ultrasound, and photoacoustic imaging. Various cancer therapeutic methods will also be included, including photothermal therapy, photodynamic therapy, chemotherapy, and immunotherapy. This review also covers theranostics, which use the same agent in diagnosis and therapy. This includes recent advances in multimodality imaging, image-guided therapy, and combination therapy. We found that the continuous advances of synthesis and design of novel nanomaterials will enhance the future development of medical imaging and cancer therapy. However, more resources should be available to examine side effects and cell toxicity when using nanomaterials in humans.

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Seed-Mediated Synthesis of Tunable-Aspect-Ratio Gold Nanorods for Near-Infrared Photoacoustic Imaging

Cited by 30 publications

References 40 publications

Advances in Plasmonic Sensing at the NIR—A Review

Advances in Plasmonic Sensing at the NIR—A Review

Computational and Experimental Analysis of Gold Nanorods in Terms of Their Morphology: Spectral Absorption and Local Field Enhancement

Application of Nanomaterials in Biomedical Imaging and Cancer Therapy

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