Fluorometric Zn2+ detection with gallic acid passivated Fe-Ag bimetallic nanocomposites

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-09-22 DOI:10.1016/j.materresbull.2025.113798

Ankita Doi , Mamta Sahu , Priyanka Sharma , Mainak Ganguly

引用次数: 0

Abstract

Tuning of metal-enhanced fluorescence (MEF) involving silver nanoparticle surface and weak fluorophore for nano-sensing is an active area of research. Gallic acid-capped iron nanoparticles could generate strong MEF by introducing Ag⁺ in the reaction mixture, and Zn²⁺ quenched fluorescence exclusively. Thus, gallic acid-capped FeAg nanocomposite performed as an ideal sensing platform for the detection of Zn²⁺ (limit of detection 1 × 10⁻⁶ M, linear detection range 5 × 10⁻⁹ to 5× 10⁻⁶M). Improved scattering cross section at ideal distance (5–90 nm), lightning rod effect, and higher rate of emission are attributed to silver-enhanced fluorescence. On the contrary, Zn²⁺ induced quenching was associated with the formation of the lossy surface wave due to energy transfer from the metal surface and fluorophore towards ZnO, following the radiating plasmon model.

Abstract Image

查看原文本刊更多论文

没食子酸钝化铁银双金属纳米复合材料的荧光法Zn2+检测

利用银纳米粒子表面和弱荧光团调谐金属增强荧光（MEF）用于纳米传感是一个活跃的研究领域。未食子酸包覆的铁纳米粒子通过在反应混合物中引入Ag+产生强MEF，而Zn2+只猝灭荧光。因此，没食子酸包覆的FeAg纳米复合材料是检测Zn2+的理想传感平台（检测限为1 × 10−6M，线性检测范围为5× 10−9 ~ 5× 10−6M）。银增强荧光改善了理想距离（5 - 90nm）下的散射截面、避雷针效应和更高的发射率。相反，根据辐射等离子体模型，由于能量从金属表面和荧光团向ZnO转移，Zn2+诱导猝灭与有耗表面波的形成有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.