From porous gold nanocups to porous nanospheres and solid particles – A new synthetic approach

Ihsan, Ayesha; Katsiev, Habib; AlYami, Noktan Mohammed; Anjum, Dalaver H.; Khan, Waheed S.; Hussain, Irshad

doi:10.1016/j.jcis.2014.12.091

Cited by 15 publications

(7 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Colloidal nanoparticles can be prepared in an ever-increasing number of shapes and sizes, giving rise to a host of varied physicochemical properties. − Anisotropic nanoparticles possess asymmetric axes, and this break in symmetry is the origin of remarkable physical properties in metallic, semiconducting, and polymeric materials. These particles also provide interesting targets for regiospecific functionalization.…”

mentioning

confidence: 99%

Anisotropic Nanoparticles and Anisotropic Surface Chemistry

Burrows

Vartanian

Abadeer

et al. 2016

J. Phys. Chem. Lett.

177

152

View full text Add to dashboard Cite

Anisotropic nanoparticles are powerful building blocks for materials engineering. Unusual properties emerge with added anisotropy-often to an extraordinary degree-enabling countless new applications. For bottom-up assembly, anisotropy is crucial for programmability; isotropic particles lack directional interactions and can self-assemble only by basic packing rules. Anisotropic particles have long fascinated scientists, and their properties and assembly behavior have been the subjects of many theoretical studies over the years. However, only recently has experiment caught up with theory. We have begun to witness tremendous diversity in the synthesis of nanoparticles with controlled anisotropy. In this Perspective, we highlight the synthetic achievements that have galvanized the field, presenting a comprehensive discussion of the mechanisms and products of both seed-mediated and alternative growth methods. We also address recent breakthroughs and challenges in regiospecific functionalization, which is the next frontier in exploiting nanoparticle anisotropy.

show abstract

mentioning

confidence: 99%

Anisotropic Nanoparticles and Anisotropic Surface Chemistry

Burrows

Vartanian

Abadeer

et al. 2016

J. Phys. Chem. Lett.

177

152

View full text Add to dashboard Cite

show abstract

“…Various approaches developed to achieve this end include AuNP encapsulation in other biologically safe and compatible materials, such as porous Au nanocups and nanospheres. 26 Hybrid metal oxide such as copper or iron oxide AuNPs with core-shell structure have also been proposed. 27 Even a graphene-based AuNP hybrid has been developed.…”

Section: Solution Phase Gold Nanoparticles Characterizationmentioning

confidence: 99%

Imaging intracellular and systemicin vivogold nanoparticles to enhance radiotherapy

Botchway¹,

Coulter²,

Currell³

2015

BJR

View full text Add to dashboard Cite

Nanoparticles offer alternative options in cancer therapy both as drug delivery carriers and as direct therapeutic agents for cancer cell inactivation. More recently, gold nanoparticles (AuNPs) have emerged as promising radiosensitizers achieving significantly elevated radiation dose enhancement factors when irradiated with both kilo-electron-volt and mega-electron-volt X-rays. Use of AuNPs in radiobiology is now being intensely driven by the desire to achieve precise energy deposition in tumours. As a consequence, there is a growing demand for efficient and simple techniques for detection, imaging and characterization of AuNPs in both biological and tumour samples. Spatially accurate imaging on the nanoscale poses a serious challenge requiring high- or super-resolution imaging techniques. In this mini review, we discuss the challenges in using AuNPs as radiosensitizers as well as various current and novel imaging techniques designed to validate the uptake, distribution and localization in mammalian cells. In our own work, we have used multiphoton excited plasmon resonance imaging to map the AuNP intracellular distribution. The benefits and limitations of this approach will also be discussed in some detail. In some cases, the same “excitation” mechanism as is used in an imaging modality can be harnessed to make it also a part of therapy modality (e.g. phototherapy)—such examples are discussed in passing as extensions to the imaging modality concerned.

show abstract

“…In particular, the mechanical behavior of Au-based porous NS is studied as a model structure for face-centered cubic (fcc) materials. The choice of the studied material is motivated by several factors: (i) there are many experiments that have synthesized Au porous NS with a size of a few to tens of nanometers; [36,37] (ii) the large number of studies addressing the mechanical behavior of Au nanoporous materials; [32,[38][39][40] (iii) the importance of Au hollow nanoparticles in fields such as catalysis, sensing, or plasmonics, where mechanical strain could be an interesting tool to modify the material performance [41,42].…”

Section: Introductionmentioning

confidence: 99%

Probing the Mechanical Properties of Porous Nanoshells by Nanoindentation

et al. 2022

View full text Add to dashboard Cite

In this contribution, we present a study of the mechanical properties of porous nanoshells measured with a nanoindentation technique. Porous nanoshells with hollow designs can present attractive mechanical properties, as observed in hollow nanoshells, but coupled with the unique mechanical behavior of porous materials. Porous nanoshells display mechanical properties that are dependent on shell porosity. Our results show that, under smaller porosity values, deformation is closely related to the one observed for polycrystalline and single-crystalline nanoshells involving dislocation activity. When porosity in the nanoparticle is increased, plastic deformation was mediated by grain boundary sliding instead of dislocation activity. Additionally, porosity suppresses dislocation activity and decreases nanoparticle strength, but allows for significant strain hardening under strains as high as 0.4. On the other hand, Young’s modulus decreases with the increase in nanoshell porosity, in agreement with the established theories of porous materials. However, we found no quantitative agreement between conventional models applied to obtain the Young’s modulus of porous materials.

show abstract

From porous gold nanocups to porous nanospheres and solid particles – A new synthetic approach

Cited by 15 publications

References 46 publications

Anisotropic Nanoparticles and Anisotropic Surface Chemistry

Anisotropic Nanoparticles and Anisotropic Surface Chemistry

Imaging intracellular and systemicin vivogold nanoparticles to enhance radiotherapy

Probing the Mechanical Properties of Porous Nanoshells by Nanoindentation

Contact Info

Product

Resources

About