Gold Hollow Nanospheres:  Tunable Surface Plasmon Resonance Controlled by Interior-Cavity Sizes

Liang, Han‐Pu; Wan, Li‐Jun; Bai, Chunli; Jiang, Li

doi:10.1021/jp045006f

Cited by 299 publications

(294 citation statements)

References 46 publications

(27 reference statements)

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“…By varying the stoichiometric ratio of HAuCl 4 to cobalt, Liang et al was able to red shift the LSPR of the HGNs from ∼520 nm, where solid gold absorbs, to ∼628 nm [75]. The key to controlling the nucleation and growth of the cobalt template was through the use of excess reducing agent (sodium borohydride), which had been previously reported by Lisiecki et al [110].…”

Section: Tuning the Lspr Of Hgnsmentioning

confidence: 83%

“…The key to controlling the nucleation and growth of the cobalt template was through the use of excess reducing agent (sodium borohydride), which had been previously reported by Lisiecki et al [110]. The red shift in absorption was attributed to differences in shell thickness which were controlled by the addition of varying stoichiometric ratios of gold to cobalt with smaller additions of gold resulting in thinner shells with enhanced absorption at longer wavelengths [75].…”

Section: Tuning the Lspr Of Hgnsmentioning

confidence: 92%

“…HGNs are comprised of a hollow, solvent filled dielectric core and a polycrystalline gold shell [66,[75][76][77]. Both the core width and shell thickness can be tuned through synthesis to produce a range of overall diameters (20-125 nm) and aspect ratios.…”

Section: Metal Nanostructuresmentioning

confidence: 99%

“…In 2005 Liang et al also used galvanic replacement to produce HGNs, but instead of using silver as a sacrificial template, used cobalt (Co 2+ /Co 0 −0.377 V vs. SHE) and gold (AuCl 4 /Au 0 0.935 V vs. SHE) as the redox pair [75]. In this case the facet energies of the hexagonal close packed (HCP) structure of the cobalt template are known to increase 0001 < 10-10 < 10-11 < 11-20 < 10-12 < 11-21 with respective energies of 131,140,149,155,156,163 (meV/Å 2 ) [109].…”

Section: Tuning the Lspr Of Hgnsmentioning

confidence: 99%

“…Once the cobalt template has reached a fixed diameter, galvanic replacement (step 3) is initiated. In this step elemental cobalt is oxidized back to a salt and the HAuCl 4 species is reduced to a polycrystalline shell [66,75].…”

Section: Tuning Lspr To the Nirmentioning

confidence: 99%

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Controllable Cobalt Oxide/Au Hierarchically Nanostructured Electrode for Nonenzymatic Glucose Sensing

2016

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By electrodeposition and galvanic replacement reaction, we developed a facile, time-saving, cost-effective, and environmentally friendly, two-step synthesis route to obtain a controllable cobalt oxide/Au hierarchically nanostructured electrode for glucose sensing. The nanomaterials were characterized by transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, energy-dispersive spectrometry, and X-ray photoelectron spectroscopy, meanwhile, the sensing performance was investigated by cyclic voltammetry and amperometric response. The results revealed that this novel electrode exhibited excellent electrocatalytic performance toward glucose oxidation, with a wide double-linear range from 0.2 μM to 20 mM and a low detection limit of 0.1 μM based on a signal-to-noise ratio of 3, which was mainly attributed to the ability of loading a small amount of Au with good electron conductivity on the surface of cobalt oxide nanosheets with large active surface area and synergistic electrocatalytic activity of Au and cobalt oxide toward glucose electrooxidation. This facile, sensitive, and selective glucose sensor is also proven to be suitable for the detection of glucose in human serum.

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Section: Tuning the Lspr Of Hgnsmentioning

confidence: 83%

Section: Tuning the Lspr Of Hgnsmentioning

confidence: 92%

Section: Metal Nanostructuresmentioning

confidence: 99%

Section: Tuning the Lspr Of Hgnsmentioning

confidence: 99%

Section: Tuning Lspr To the Nirmentioning

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Liquid‐Phase Synthesis of Inorganic Nanoparticles

Caruntu

O’Connor

2005

Encyclopedia of Inorganic Chemistry

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In this article we review some of the most representative liquid‐phase synthetic methodologies for the preparation of inorganic nanoparticles. Metallic nanoparticles and alloys have been chosen as a model to discuss the preparation of colloidal nanocrystals and their functionalization with organic molecules. Of a particular interest have been the synthetic methodologies allowing not only the compositional control of the nanoparticles but also the size/shape of the nanoparticles along with their ability to organize into hierarchical architectures suitable for different technological applications.

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Theranostic Applications of Gold Core–Shell Structured Nanoparticles

Lü

Melancon

2011

Nanoplatform‐Based Molecular Imaging

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Gold core-shell nanostructures have unique optical properties due to strong and tunable surface plasmon resonance, which is a collective oscillation of conduction-band electrons within the structures induced by the oscillating dipole of a resonant wavelength of light. By varying the core composition, core radius, and shell thickness, the optical resonances of core-shell nanostructures-including silica-core gold nanoshells, hollow gold nanoshells, and hollow gold nanocages-can be continuously tuned through wavelengths ranging from the ultraviolet region to the infrared region. These novel nanoparticles have been shown to be useful for a variety of potential applications in biomedicine, including cancer molecular optical imaging, controlled drug delivery, and photothermal ablation therapy. In this chapter, we provide an up-to-date summary of the synthesis, characterization, and preclinical evaluation of gold core-shell nanostructures. We also touch upon the development of multifunctional gold core-shell nanoparticles for theranostic applications (i.e., simultaneous treatment and diagnosis) for cancer. INTRODUCTIONTheranostics are agents that have both a treatment and a diagnostic function. The theranostic approach tailors treatment to the individual patient and has the potential to offer improved therapeutic efficacy, reduced side effects, and improved cost effectiveness. Nanotechnology as an enabling technology has attracted much attention in recent years. In particular, multifunctional nanomaterials incorporating both diagnostic and therapeutic functions have been created and evaluated for cancer theranostic applications.Nanomaterials that interact with light provide a unique opportunity [1]. These photocoupling agents can not only report the molecular-specific signatures of cancer with high sensitivity and high spatial resolution but also mediate photochemical, photothermal, and photomechanical responses that can be harnessed to kill cancer cells. Nanoplatform-Based Molecular Imaging Edited by Xiaoyuan Chen

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Gold Hollow Nanospheres: Tunable Surface Plasmon Resonance Controlled by Interior-Cavity Sizes

Cited by 299 publications

References 46 publications

Controllable Cobalt Oxide/Au Hierarchically Nanostructured Electrode for Nonenzymatic Glucose Sensing

Controllable Cobalt Oxide/Au Hierarchically Nanostructured Electrode for Nonenzymatic Glucose Sensing

Liquid‐Phase Synthesis of Inorganic Nanoparticles

Theranostic Applications of Gold Core–Shell Structured Nanoparticles

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