Exploiting Le Chatelier's principle for a one-pot synthesis of nontoxic HHogGNPs with the sharpest nanoscopic features suitable for tunable plasmon spectroscopy and high throughput SERS sensing

Abstract

Applying Le Chatelier's principle, a one-pot synthesis method is reported that generates highly anisotropic hedgehog gold nanoparticles (HHogGNPs), undemanding of a preformed seed or surfactant. These non-toxic HHogGNPs are potent candidates for nanomedicinal applications owing to their broad-band plasmon tunability, gigantic Raman enhancement and remarkable retention in a highly salted physiological environment.

Present and Future of Surface-Enhanced Raman Scattering

“…Nonetheless, these particles can still be found in the literature under a wide variety of names. For instance, they have been defined as branched NPs, 166 nanoflowers, 167 multipods (tetrapods, hexapods, or octapods), 168 nanourchins, 169 highly branched nanostructures, 170 hedgehog NPs, 171 spiky NPs, 172 wrinkled NPs, 173 nanodendrites, 174 nanopopcorn, 175 nanoflowers, 176 and even nanoechinus. 177 Although one can understand that an NP called nanopopcorn may have shorter and more rounded branches than another termed nanourchin, in certain instances the differentiation has become quite blurry, especially as the field has moved forward during the past 10 years, and research has focused more on the application, rather than the synthesis and detailed characterization, of these particles.…”

Unveiling the Excellent Electrocatalytic Activity of Grain-Boundary Enriched Anisotropic Pure Gold Nanostructures toward Hydrogen Evolution Reaction: A Combined Approach of Experiment and Theory

“…However, the main drawback of this technique is its time-consuming nature as well as the growth of nanoparticles, which depends mostly on the nature of the nanoseed. On the other hand, template-based synthesis is more fascinating since it offers an interesting and useful characteristic to the nanomaterials such as controlled sizes, morphologies, and different physicochemical properties . Both soft and hard templates have been successfully employed for the synthesis of different shaped AuNPs, viz., nanorods, nanorings, nanotubes, and porous structures.…”

“…On the other hand, template-based synthesis is more fascinating since it offers an interesting and useful characteristic to the nanomaterials such as controlled sizes, morphologies, and different physicochemical properties. 51 Both soft and hard templates have been successfully employed for the synthesis of different shaped AuNPs, viz., nanorods, nanorings, nanotubes, and porous structures. The soft templates are mainly large organic compounds (i.e., surfactants or polymers), used for surface stabilization, while the porous solid inorganic materials such as anodic aluminum oxide (AAO), mesoporous oxides, and carbon nanotubes (CNTs) can be used as hard templates.…”

Wide Range Morphological Transition of Silver Nanoprisms by Selective Interaction with As(III): Tuning–Detuning of Surface Plasmon Offers To Decode the Mechanism

“…On the basis of their wealth of optical properties (absorption, emission, and scattering), the noble metal nanoparticles (NPs) find high-throughput applications in different advanced fields, − which include sensing, diagnostics, therapeutics, optoelectronics, catalysis, alternate energy, etc. Surface plasmon resonance (SPR) − bands of noble metal NPs are typically located in the vis–near-infrared region and are strongly dependent on the NP size, shape, composition, crystallinity, interparticle spacing, and local dielectric environment. ,− Out of several noble metal NPs, silver nanoprism (AgNPr) is one of the most promising candidates for multicolor diagnostic labeling purposes because of its easy tunability of the broadband in-plane dipole SPR simply by adjusting the aspect ratios (AR s ) = L / T where L = side length of the prism and T = thickness of the prism and by inducing their two-dimensional (2D) and three-dimensional assemblies . Yu and Jiang and others found that silver nanoplates are sensitive to several inorganic anions and result in SPR band tuning between 650 and 450 nm by adjusting the added anion concentration.…”