Plasmonic silver and gold nanoparticles: shape- and structure-modulated plasmonic functionality for point-of-caring sensing, bio-imaging and medical therapy

Hang, Yingjie; Wang, Anyang; Wu, Nianqiang

doi:10.1039/d3cs00793f

Cited by 43 publications

(7 citation statements)

References 261 publications

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“…Now that we have discussed the crystal structures of many of the elements, it is useful to consider how these crystal structures translate to nanoscale features. One of the hallmarks of nanocrystal chemistry is the ability to access different shapes, which can have different properties such as surface plasmon resonance frequencies or catalytic activities and/or selectivities. , Synthetic control of nanocrystal shape is often achieved by using different surfactants and/or reaction conditions that slow down or accelerate growth in certain crystallographic directions, based on a complex interplay between surface energies and ligand binding strengths . It is therefore important to have a framework for labeling and discussing the different crystal planes, facets, and directions …”

Section: Crystallographic Planes Directions and Facetsmentioning

confidence: 99%

Tutorial on Describing, Classifying, and Visualizing Common Crystal Structures in Nanoscale Materials Systems

Baumler,

Schaak

2024

ACS Nanosci. Au

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Crystal structures underpin many aspects of nanoscience and technology, from the arrangements of atoms in nanoscale materials to the ways in which nanoscale materials form and grow to the structures formed when nanoscale materials interact with each other and assemble. The impacts of crystal structures and their relationships to one another in nanoscale materials systems are vast. This Tutorial provides nanoscience researchers with highlights of many crystal structures that are commonly observed in nanoscale materials systems, as well as an overview of the tools and concepts that help to derive, describe, visualize, and rationalize key structural features. The scope of materials focuses on the elements and their compounds that are most frequently encountered as nanoscale materials, including both close-packed and nonclose-packed structures. Examples include three-dimensionally and two-dimensionally bonded compounds related to the rocksalt, nickel arsenide, fluorite, zincblende, wurtzite, cesium chloride, and perovskite structures, as well as layered perovskites, intergrowth compounds, MXenes, transition metal dichalcogenides, and other layered materials. Ordered versus disordered structures, high entropy materials, and instructive examples of more complex structures, including copper sulfides, are also discussed to demonstrate how structural visualization tools can be applied. The overall emphasis of this Tutorial is on the ways in which complex structures are derived from simpler building blocks, as well as the similarities and interrelationships among certain classes of structures that, at first glance, may be interpreted as being very different. Identifying and appreciating these structural relationships is useful to nanoscience researchers, as it allows them to deconstruct complex structures into simpler components, which is important for designing, understanding, and using nanoscale materials.

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Section: Crystallographic Planes Directions and Facetsmentioning

confidence: 99%

Tutorial on Describing, Classifying, and Visualizing Common Crystal Structures in Nanoscale Materials Systems

Baumler,

Schaak

2024

ACS Nanosci. Au

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“…Gold nanoparticles (AuNPs) are the most widely studied photothermal agents (PTAs) based on inorganic materials. − Gold nanoparticles own peculiar electrical and optical properties, associated with high biocompatibility, that make them attractive for nanomedicine. ,,, As with other noble metal nanoparticles (Ag, Cu, and Pt), AuNPs possess a strong localized surface plasmon resonance band (LSPR), an interesting feature for photothermal issues. Plasmonic nanostructures are ideal candidates for light-to-heat conversion, since they can absorb incident photons with high cross-section and they convert them into heat through Landau damping of electron–hole pairs .…”

Section: Gold Nanomaterialsmentioning

confidence: 99%

“…Gold nanoparticles (AuNPs) are the most widely studied photothermal agents (PTAs) based on inorganic materials. 30 − 32 Gold nanoparticles own peculiar electrical and optical properties, associated with high biocompatibility, that make them attractive for nanomedicine. 16 , 31 , 33 , 34 As with other noble metal nanoparticles (Ag, Cu, and Pt), 35 AuNPs possess a strong localized surface plasmon resonance band (LSPR), an interesting feature for photothermal issues.…”

Section: Gold Nanomaterialsmentioning

confidence: 99%

Nanomaterials for Photothermal Antimicrobial Surfaces

Doveri,

Diaz Fernandez,

Dacarro

2024

ACS Omega

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Microbial infection diseases are a major threat to human health and have become one of the main causes of mortality. The search for novel antimicrobial strategies is an important challenge for the scientific community, considering also the constant increase of antimicrobial resistance and the rise of new diseases. Among the new strategies to combat microbial infections, the photothermal effect seems to be one of the most promising. Hyperthermia is an effective and broad spectrum strategy for the removal of microbial infections. Among all of the strategies to reduce the diffusion of microbial infections, the preparation of antimicrobial surfaces seems of primary importance. In many cases, in fact, an infection can be diffused through surfaces just by touching them, or by inoculating microbes through an internalizable device, such as an implant, a prosthesis, or a catheter. In this review, we will summarize the recent advances in the preparation of photothermal antibacterial surfaces.

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“…The optical and electronic characteristics of silver nanostructures have generated great interest for various applications [1][2][3] such as Surface-Enhanced Raman Spectroscopy (SERS) applied to the Conservation and Restoration of Cultural Heritage Objects. [4][5][6] In this sense, the localized surface plasmon resonance (LSPR) of silver nanoparticles (AgNPs) allows the intensification of Raman signals and the reduction of the fluorescence signal generated by the effect of the interaction of incident radiation with the molecular bonds of the analyte.…”

Section: Introductionmentioning

confidence: 99%

Removable PDMS Films with Ultra‐Low AgNPs Content and Effective SERS Effect by N‐Octylamine Transfer and Immersion Deposition

Aguilar‐Melo,

Pech‐Pech,

Bacelis‐Jiménez

et al. 2024

ChemistrySelect

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The short alkyl chain of N‐octylamine was demonstrated to be able to transfer silver nanoparticles (AgNPs) from the aqueous to toluene phase with a narrow average size lower than 10 nm via ligand exchange between N‐octylamine and the sodium citrate used as a reducing and stabilizing agent during AgNPs synthesis. Surface plasmon analysis by UV‐visible spectroscopy showed that the N‐octylamine concentration significantly influences the concentration and stability of AgNPs transferred to the toluene phase and the time required for such transfer. Then, the transferred silver nanoparticles were deposited on a polydimethylsiloxane (PDMS) substrate by drop‐casting (PDMS‐T‐50‐D) or immersion (PDMS‐T‐50‐I). XPS analysis demonstrated that the AgNPs are deposited at lower than 0.02 % atomic percentages through both deposition methods. The Raman signal and the noise by fluorescence signal were shown to be significantly influenced by the AgNPs deposition method on PDMS film. The trace content of AgNPs on the flexible PDMS films on both PDMS‐T‐50‐D and PDMS‐T‐50‐I substrates can eliminate the fluorescence signal of the analyte; however, only the PDMS‐T‐50‐I substrate demonstrated a remarkable SERS‐enhanced signal. These results could significantly contribute to the design of new flexible and removable SERS substrates with ultra‐low contents of noble metal NPs.

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Plasmonic silver and gold nanoparticles: shape- and structure-modulated plasmonic functionality for point-of-caring sensing, bio-imaging and medical therapy

Abstract: Silver and gold nanoparticles have found extensive biomedical applications due to their strong localized surface plasmon resonance (LSPR) and intriguing plasmonic properties.

Cited by 43 publications

References 261 publications

Tutorial on Describing, Classifying, and Visualizing Common Crystal Structures in Nanoscale Materials Systems

Tutorial on Describing, Classifying, and Visualizing Common Crystal Structures in Nanoscale Materials Systems

Nanomaterials for Photothermal Antimicrobial Surfaces

Removable PDMS Films with Ultra‐Low AgNPs Content and Effective SERS Effect by N‐Octylamine Transfer and Immersion Deposition

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