Effect of Growth Temperature on Tailoring the Size and Aspect Ratio of Gold Nanorods

Liu, Xiaowei; Yao, Jingwen; Luo, Jiangjiang; Duan, Xiaoshuang; Yao, Yanbo; Liu, Tao

doi:10.1021/acs.langmuir.7b01635

Cited by 21 publications

(18 citation statements)

References 40 publications

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“…During the modification of the experimental procedure, it was noted that several other parameters, including the additives (both organic and inorganic), the pH value, the reaction temperature, and the nature of the reducing agent could all affect the purity and AR of the resultant AuNRs. − …”

Section: Monometallic Systemsmentioning

confidence: 99%

One-Dimensional Metal Nanostructures: From Colloidal Syntheses to Applications

et al. 2019

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This Review offers a comprehensive review of the colloidal synthesis, mechanistic understanding, physicochemical properties, and applications of onedimensional (1D) metal nanostructures. After a brief introduction to the different types of 1D nanostructures, we discuss major concepts and methods typically involved in a colloidal synthesis of 1D metal nanostructures, as well as the current mechanistic understanding of how the nanostructures are formed. We then highlight how experimental studies and computational simulations have expanded our knowledge of how and why 1D metal nanostructures grow. Following specific examples of syntheses for monometallic, multimetallic, and heterostructured systems, we showcase how the unique structure− property relationships of 1D metal nanostructures have enabled a broad spectrum of applications, including sensing, imaging, plasmonics, photonics, display, thermal management, and catalysis. Throughout our discussion, we also offer perspectives with regard to the future directions of development for this class of nanomaterials.

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Section: Monometallic Systemsmentioning

confidence: 99%

One-Dimensional Metal Nanostructures: From Colloidal Syntheses to Applications

et al. 2019

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“…On the other hand, although temperature is the most straightforward parameter to tune reaction kinetics, it remains barely explored. 30 , 31 It should be noted that most of the work reported on the use of additives has been performed by using single crystalline seeds, in turn resulting in monocrystalline AuNRs with octahedral cross section, containing an unknown amount of silver, which is also required during the synthesis. 32 On the contrary, additive-free nanorods are usually grown from pentatwinned (decahedral) seeds, so that the 5-fold twinning in the seeds is preserved in the final nanorods as well.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Regulation of the Synthesis of Pentatwinned Gold Nanorods below Room Temperature

et al. 2021

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The synthesis of gold nanorods requires the presence of symmetry-breaking and shape-directing additives, among which bromide ions and quaternary ammonium surfactants have been reported as essential. As a result, hexadecyltrimethylammonium bromide (CTAB) has been selected as the most efficient surfactant to direct anisotropic growth. One of the difficulties arising from this selection is the low solubility of CTAB in water at room temperature, and therefore the seeded growth of gold nanorods is usually performed at 25 °C or above, which has restricted so far the analysis of kinetic effects derived from lower temperatures. We report a systematic study of the synthesis of gold nanorods from pentatwinned seeds using hexadecyltrimethylammonium chloride (CTAC) as the principal surfactant and a low concentration of bromide as shape-directing agent. Under these conditions, the synthesis can be performed at temperatures as low as 8 °C, and the corresponding kinetic effects can be studied, resulting in temperature-controlled aspect ratio tunability.

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“…By using a population balance framework for mathematical modeling and numerical simulations, the authors were able to predict the final yield of a synthesis, introducing a new concept named “shape nucleation” which explains and predicts the extent of the presence of at least two morphologies, nanospheres and nanorods [ 21 ]. In the binary-surfactant protocol, the role of the temperature has been profoundly evaluated, giving a fundamental contribution on the comprehension of rod formation [ 23 ]. Among all the parameters, it is known that the addition of AgNO 3 is a crucial step in many anisotropic gold nanoparticles synthesis to finely control the final shape formation.…”

Section: Synthesismentioning

confidence: 99%

Anisotropic Gold Nanoparticles in Biomedical Applications

Kohout

Santi

Polito

2018

IJMS

110

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Gold nanoparticles (AuNPs) play a crucial role in the development of nanomedicine, principally due to their unique photophysical properties and high biocompatibility. The possibility to tune and customize the localized surface plasmon resonance (LSPR) toward near-infrared region by modulating the AuNP shape is one of the reasons for the huge widespread use of AuNPs. The controlled synthesis of no-symmetrical nanoparticles, named anisotropic, is an exciting goal achieved by the scientific community which explains the exponential increase of the number of publications related to the synthesis and use of such type of AuNPs. Even with such steps forward and the AuNP translation in clinic being done, some key issues are still remain and they are related to a reliable and scalable production, a full characterization, and to the development of nanotoxicology studies on the long run. In this review we highlight the very recent advances on the synthesis of the main classes of anisotropic AuNPs (nanorods, nanourchins and nanocages) and their use in the biomedical fields, in terms of diagnosis and therapeutics.

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Effect of Growth Temperature on Tailoring the Size and Aspect Ratio of Gold Nanorods

Cited by 21 publications

References 40 publications

One-Dimensional Metal Nanostructures: From Colloidal Syntheses to Applications

One-Dimensional Metal Nanostructures: From Colloidal Syntheses to Applications

Kinetic Regulation of the Synthesis of Pentatwinned Gold Nanorods below Room Temperature

Anisotropic Gold Nanoparticles in Biomedical Applications

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