Controllable synthesis of Au nanocrystals with systematic shape evolution from an octahedron to a truncated ditetragonal prism and rhombic dodecahedron

Qin, Yazhou; Lu, Yunhu; Yu, Dongdong; Zhou, Jianguang

doi:10.1039/c9ce01022j

Cited by 19 publications

(12 citation statements)

References 51 publications

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“…The THH Au NPs with a size of about 100 nm, which was prepared according to our previous reported method with a little modified. 6 First, add 0.4 mL of poly(diallyldimethylammonium)chloride (PDDA) to a 50 mL round bottom flask with 19 mL of ethylene glycol, and stir vigorously at 25 °C for 5 min. Then add 100 μL of 0.25 M HAuCl 4 ·3H 2 O solution and 50 μL of 25 mM AgNO 3 solution to the above solution.…”

Section: Methodsmentioning

confidence: 99%

“…In the past few decades, a lot of research has been devoted to the preparation of Au NPs with controllable morphology and size. Including wet chemistry, [6][7][8] electrochemistry, 9,10 and photochemistry 11 have been developed to prepare Au NPs of various morphology and size. In the past few decades, Au cubes, 12,13 octahedron 14,15 and rhombic dodecahedra 16,17 with low-index facet and trisoctahedral, 18,19 truncated ditetragonal, 20 tetrahexahedral, 21 hexoctahedron 22,23 and trapezohedral 24 with high-index facet have been successfully prepared.…”

Section: Introductionmentioning

confidence: 99%

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Controllable preparation of sea urchin-like Au NPs as a SERS substrate for highly sensitive detection of the toxic atropine

Qin

Wang

et al. 2021

RSC Adv.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Controllable preparation of sea urchin-like Au NPs as a SERS substrate for highly sensitive detection of the toxic atropine

Qin

Wang

et al. 2021

RSC Adv.

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“…Poly(diallyl dimethyl ammonium chloride) (PDDA) as a long‐chain and positively charged polyelectrolyte has been widely used as the surfactant to modulate the crystal growth and control the morphology of nanocrystals. [ 171 ] The variation of PDDA concentration is crucial to control the growth of crystalline facets. Du et al.…”

Section: Amino‐based Polymersmentioning

confidence: 99%

Recent Advances in Amino‐Based Molecules Assisted Control of Noble‐Metal Electrocatalysts

et al. 2021

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Morphology‐control synthesis is an effective means to tailor surface structure of noble‐metal nanocrystals, which offers a sensitive knob for tuning their electrocatalytic properties. The functional molecules are often indispensable in the morphology‐control synthesis through preferential adsorption on specific crystal facets, or controlling certain crystal growth directions. In this review, the recent progress in morphology‐control synthesis of noble‐metal nanocrystals assisted by amino‐based functional molecules for electrocatalytic applications are focused on. Although a mass of noble‐metal nanocrystals with different morphologies have been reported, few review studies have been published related to amino‐based molecules assisted control strategy. A full understanding for the key roles of amino‐based molecules in the morphology‐control synthesis is still necessary. As a result, the explicit roles and mechanisms of various types of amino‐based molecules, including amino‐based small molecules and amino‐based polymers, in morphology‐control of noble‐metal nanocrystals are summarized and discussed in detail. Also presented in this progress are unique electrocatalytic properties of various shaped noble‐metal nanocrystals. Particularly, the optimization of electrocatalytic selectivity induced by specific amino‐based functional molecules (e.g., polyallylamine and polyethyleneimine) is highlighted. At the end, some critical prospects, and challenges in terms of amino‐based molecules‐controlled synthesis and electrocatalytic applications are proposed.

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“…Zhou et al also reported a one-pot synthesis involving the use of ethylene glycol (EG) as a reductant and poly-(diallyldimethylammonium) chloride (PDDA) as a coordination ligand, but the AuRD were not formed directly. 15 Instead, octahedra were formed first and then transformed into AuRD by carefully manipulating the temperature to adjust the reducing power of EG. In addition, the Cl − from AuCl 4…”

Section: ■ Introductionmentioning

confidence: 99%

Mechanistic Study of Seed-Mediated Growth of Gold Rhombic Dodecahedra

et al. 2021

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It is a viable approach to tailor the optical and catalytic properties of noble-metal nanocrystals by controlling their geometric shapes. Among various shapes, rhombic dodecahedra are considered particularly difficult to synthesize owing to the higher energy of {110} facets relative to other low-index facets. Here we report a facile synthesis of Au rhombic dodecahedra with high uniformity and purity through seed-mediated growth in N,N-dimethylformamide (DMF) containing a small amount of water. The success of this synthesis critically relied on the use of single-crystal seeds with a spherical shape, the capability of DMF to selectively cap the {110} facets, and the balance between deposition and surface diffusion. We systematically investigated the effects of the amounts of poly(vinylpyrrolidone) (PVP), seeds, and water on the synthesis, as well as reaction temperature and time. Under the condition optimal for layer-by-layer growth and with the use of 10 nm seeds, the edge lengths of the rhombic dodecahedra could be tuned from 18−36 nm by increasing the duration of growth time. This method also offers a facile route to Au nanocrystals with other shapes. For example, by varying the amount and molecular weight of PVP, as well as temperature, the same protocol could be adapted to obtain trisoctahedra and octahedra, respectively, in high yield and quality.

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Controllable synthesis of Au nanocrystals with systematic shape evolution from an octahedron to a truncated ditetragonal prism and rhombic dodecahedron

Abstract: Stepwise evolution of Au nanocrystals from an octahedron to a truncated ditetragonal prism and rhombic dodecahedron was achieved by the polyol synthesis method.

Cited by 19 publications

References 51 publications

Controllable preparation of sea urchin-like Au NPs as a SERS substrate for highly sensitive detection of the toxic atropine

Controllable preparation of sea urchin-like Au NPs as a SERS substrate for highly sensitive detection of the toxic atropine

Recent Advances in Amino‐Based Molecules Assisted Control of Noble‐Metal Electrocatalysts

Mechanistic Study of Seed-Mediated Growth of Gold Rhombic Dodecahedra

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