Gold nanorods and their nanocomposites: Synthesis and recent applications in analytical chemistry

Gorbunova, M. V.; Apyari, V. V.; Дмитриенко, С. Г.; Zolotov, Yury A.

doi:10.1016/j.trac.2020.115974

Cited by 26 publications

(17 citation statements)

References 83 publications

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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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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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“…Anisotropic Nanorods are cylindrical rod-shaped particles with uniform diameters ranging from a few nanometers to hundreds of nanometers, with aspect ratios (length to width) larger than 1 but typically smaller than 10 [ 27 ]. The main features of AuNRs are depending properties like intensities and spectral positions of SPR-bands, aggregative stability, electroconductivity, and redox potential by physical size [ 28 ]. One of the peculiarities of the AuNRs is those to present two distinct surface plasmon resonances; one along with the longitudinal ax and one on the transversal ax.…”

Section: Nanomaterialsmentioning

confidence: 99%

“…One of the peculiarities of the AuNRs is those to present two distinct surface plasmon resonances; one along with the longitudinal ax and one on the transversal ax. The longitudinal plasmon resonance generates radiation in a wide range from visible to near-infrared regions depending on the AuNRs aspect ratio and their size which is a distinguishable feature of nanorods when compared to nanoparticles [ 28 , 29 ]. Among the different approaches proposed to producing AuNRs, seed-mediated growth is the most commonly used because of a simple procedure, adjustable aspect ratio, great uniformity, and adaptability for post-modification[ 9 , 30 ].…”

Section: Nanomaterialsmentioning

confidence: 99%

“…Among the different approaches proposed to producing AuNRs, seed-mediated growth is the most commonly used because of a simple procedure, adjustable aspect ratio, great uniformity, and adaptability for post-modification[ 9 , 30 ]. There are promising reviews about the synthesis and properties of gold nanorods [ 30 ] gold nanorods and their nanocomposites synthesis and recent applications in Analytical chemistry [ 28 ].…”

Section: Nanomaterialsmentioning

confidence: 99%

“…AuNCs are characterized by photoluminescence [ 32 ]and high catalytic properties [ 33 ]; on the other end, AuNCs do not present the surface plasmon resonance properties characteristic of the AuNPs and AuNRs [ 9 ]. Zhang et al discussed synthesis methods [ 28 ] and biomedical and biosensing applications of Au nanoclusters in a recent review [ 34 ].…”

Section: Nanomaterialsmentioning

confidence: 99%

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Nanomaterial application in bio/sensors for the detection of infectious diseases

Sheikhzadeh

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Zourob

2021

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Infectious diseases are a potential risk for public health and the global economy. Fast and accurate detection of the pathogens that cause these infections is important to avoid the transmission of the diseases. Conventional methods for the detection of these microorganisms are time-consuming, costly, and not applicable for on-site monitoring. Biosensors can provide a fast, reliable, and point of care diagnostic. Nanomaterials, due to their outstanding electrical, chemical, and optical features, have become key players in the area of biosensors. This review will cover different nanomaterials that employed in electrochemical, optical, and instrumental biosensors for infectious disease diagnosis and how these contributed to enhancing the sensitivity and rapidity of the various sensing platforms. Examples of nanomaterial synthesis methods as well as a comprehensive description of their properties are explained. Moreover, when available, comparative data, in the presence and absence of the nanomaterials, have been reported to further highlight how the usage of nanomaterials enhances the performances of the sensor.

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Recent Advances and Synthetic Approaches of AuNRs for Sensing Applications Based on Different Aspect Ratios

Hao,

Qin

2024

Advanced Sensor Research

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Gold nanorods (AuNRs), 1D rod‐shaped nanomaterials, hold a crucial role in sensing applications due to their distinct physicochemical properties, such as high surface area, efficient mass transfer, good biocompatibility, and anisotropic optical and electronic responses. This review outlines the most recent advancements in AuNRs research, offering a comprehensive summary of synthetic strategies. Subsequently, the potential of AuNRs in sensor applications is discussed, and for the first time, an innovative analysis of their application in the sensor field based on the aspect ratio of AuNRs is proposed. These sensing systems are utilized for detecting heavy metal ions, inorganic anions, small biomolecules, protein tumor markers, enzymes, and nucleic acids. Finally, the future research directions and challenges of AuNRs are addressed.

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Gold nanorods and their nanocomposites: Synthesis and recent applications in analytical chemistry

Cited by 26 publications

References 83 publications

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

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

Nanomaterial application in bio/sensors for the detection of infectious diseases

Recent Advances and Synthetic Approaches of AuNRs for Sensing Applications Based on Different Aspect Ratios

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