Development of novel anionic Gemini surfactants and application in fabricating hierarchical silver microparticles for surface-enhanced Raman spectroscopy

Cheng, Yuming; Liu, Xiong; Lei, Qiufen; Li, Xuefeng; Dong, Jianfeng

doi:10.1016/j.jcis.2017.06.073

Cited by 10 publications

(7 citation statements)

References 62 publications

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“…The obtained AgNP@SDDC catalysed the reduction of Ag + using a mild reducing agent like ascorbic acid and SDDC acting as a nanoparticle size director to get 7-10 nm particles. This fact is remarkable different compared to other surfactants or Gemini surfactants which usually induce growth of the seeds [10,19,24]. On the other hand, the addition of KBr led to the growth of spheres and rods of the AgNP@SDDC seeds.…”

Section: Discussionmentioning

confidence: 75%

“…We attribute this increment in the mean diameter to the well-known Ostwald ripening effect [27]. In comparison to other anionic Gemini surfactants where obtained particles were in the order of microns [24], or aggregates larger than 100 nm [23], using SDDC lead to well-dispersed spherical nanoparticles of small size. We determined the molar absorption coefficient () in water for these AgNP@SDDC after 15 days at 411 nm obtaining a value of (4.2  0.7)10 8 M -1 cm -1 when the nanoparticle concentrations were estimated using the NANoPoLC algorithm [28] with minor modifications.…”

Section: Synthesis and Characterization Of Agnp@sddcmentioning

confidence: 82%

“…Also, a few examples show the ability of anionic GS to stabilize AgNP (Table S1), for instance, Negm et al [22] utilized GS with phosphate polar heads and a polyethylene glycol spacer to exchange the citrate as ligand and improve the NP stabilization. Recently, Srivastava et al [23] used mixed micelles as capping agents of AgNP and found the higher the proportion of anionic GS in the micelle prevented NP aggregation and; Cheng et al [24] obtained microparticles with good Surface Enhanced Raman activity using a C m -Ar-C m anionic GS and a mild reducing agent.…”

Section: Introductionmentioning

confidence: 99%

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Role of a cystine-based Gemini surfactant ligand in the synthesis of catalytic active silver nanoparticles

Torres

Gómez

Fernández

et al. 2019

Journal of Molecular Liquids

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We report the synthesis in water of colloidal silver nanoparticles (AgNP) using a Gemini lipoamino acid surfactant derived from cysteine as a capping agent. The Gemini surfactant interacts with the metal surface mainly in a monodentate vertical mode through the carboxylate group preserving intact the disulfide bond. These nanoparticles present catalytic activity to the reduction of pnitrophenol, and the synthesis of AgNP under mild reduction conditions maintaining the seeds size. Also, the Gemini surfactant leads to anisotropic morphologies in the seed-mediated growth of AgNP@citrate seeds aided by the presence of bromide ions.

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Section: Discussionmentioning

confidence: 75%

Section: Synthesis and Characterization Of Agnp@sddcmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Role of a cystine-based Gemini surfactant ligand in the synthesis of catalytic active silver nanoparticles

Torres

Gómez

Fernández

et al. 2019

Journal of Molecular Liquids

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“…The maximum adsorption capacity (г max ), the effective measure of the adsorption at the water‐air interface, is obtained via Eq. (3) (Cheng et al, 2017).

Γ_{\max} = \frac{1}{2.303 nRT} {(\frac{∂γ}{\partial \log C})}_{T}

where the value n = 2.…”

Section: Resultsmentioning

confidence: 99%

“…Area per molecule (A min ) refers to the surface area occupied by one surfactant molecule at the interface, which is calculated via Eq. (4) (Cheng et al, 2017).

A_{\min} = \frac{1}{N_{A} Γ_{\max}}

where N A is Avogadro's number.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Surface Properties of Novel Quaternary Ammonium Gemini Surfactants with Polar Head Groups Containing 2‐Hydroxypropyl Moieties

Bai

Liu

Gao

et al. 2021

J Surfact & Detergents

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The purpose of this paper is to comprehend in‐depth the effect of the surfactant structure on its and physicochemical properties such as surface/interfacial properties, foam stability, wettability, and biodegradability. To this end, quaternary ammonium Gemini surfactants, alkanediyl‐α,ω‐bis[(2‐hydroxypropyl)dodecylammonium] dibromide (abbreviated as Cm‐n‐Cm[iso‐Pr(OH)]2 with m = 12, 14 and n = 2, 3, 4) were synthesized via substitution and quaternization reactions, and their chemical structures were characterized by Fourier transform infrared (FT‐IR) and nuclear magnetic resonance (1HNMR) spectroscopies. The results showed that with the decrease of the spacer length, the surface tension was reduced more strongly, and with the increase of the alkyl tail length, micelles were more easily formed. Besides, the highest surface activity of C14‐2‐C14[iso‐Pr(OH)]2 was observed by increasing NaCl concentration to 200 g L−1. The temperature had a great influence on thermodynamic parameters of the adsorption and micellization. The interfacial tension between 0.26 g L−1 C14‐2‐C14[iso‐Pr(OH)]2 solution and oil could reach 0.022 mN m−1. An elongation of the spacer chain in C14‐n‐C14[iso‐Pr(OH)]2 was unfavorable to foam stability. Besides, the oil‐wetted core, which was aged in 0.6 g L−1 C14‐2‐C14[iso‐Pr(OH)]2 solution, exhibited more hydrophilicity. Cm‐n‐Cm[iso‐Pr(OH)]2 surfactants produced higher biodegradable rates in river water (≥ 90% after 28 days) than the biodegradable surfactant of international recommendation (71% after 28 days) at 30 °C.

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Deep Eutectic Solvents, Bio-Based Solvents, and Surfactant for Green Sample Pretreatment and Determination

Lakshmipraba,

Prabhu

2022

Green Chemical Analysis and Sample Preparations

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Development of novel anionic Gemini surfactants and application in fabricating hierarchical silver microparticles for surface-enhanced Raman spectroscopy

Cited by 10 publications

References 62 publications

Role of a cystine-based Gemini surfactant ligand in the synthesis of catalytic active silver nanoparticles

Role of a cystine-based Gemini surfactant ligand in the synthesis of catalytic active silver nanoparticles

Synthesis and Surface Properties of Novel Quaternary Ammonium Gemini Surfactants with Polar Head Groups Containing 2‐Hydroxypropyl Moieties

Deep Eutectic Solvents, Bio-Based Solvents, and Surfactant for Green Sample Pretreatment and Determination

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