Preparation of α-Fe<sub>2</sub>O<sub>3</sub>/Ag core/shell nanocomposites and SERS properties

WANG Chunrong; WANG Shumei; ZHOU Zhufa; TIAN Ranran; LI Yanjie; DAI Xiaochun; TIAN Sheng

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Preparation of α-Fe₂O₃/Ag core/shell nanocomposites and SERS properties

更新时间：2025-12-10

- Preparation of α-Fe₂O₃/Ag core/shell nanocomposites and SERS properties
- CIESC Journal Issue 1, Pages: 276-280(2011)
- 作者机构：
  
  苏州大学材料与化学化工学部，现代丝绸国家工程实验室,江苏,苏州,215123
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 January 2011，
  
  Published：05 January 2011
- 稿件说明：
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WANG Chunrong, WANG Shumei, ZHOU Zhufa, et al. Preparation of α-Fe₂O₃/Ag core/shell nanocomposites and SERS properties[J]. CIESC Journal, 2011, (1): 276-280.
DOI：

WANG Chunrong, WANG Shumei, ZHOU Zhufa, et al. Preparation of α-Fe₂O₃/Ag core/shell nanocomposites and SERS properties[J]. CIESC Journal, 2011, (1): 276-280. DOI：

摘要

Abstract

With the seeding method

α-Fe2O3/Ag core-shell composite powders were prepared by the reduction of Ag［(NH3)2］+ with formaldehyde as reductant

and 3-aminopropyl triethoxysilane as additive.3-Aminopropyl triethoxysilane (APS) acted as a “bridge” to connect α-Fe2O3 and Ag particles.The obtained nanocomposites were characterized by X-ray diffraction (XRD)

transmission electron microscope (TEM) and energy-dispersive X-ray spectrometry (EDX).The influences of concentration of APS

volume ratio of alcohol to water on the coating effect and performance of nanocomposites were investigated.With pyridine (Py) as a molecule probe

Raman spectroscopy (SERS) properties and stability of the α-Fe2O3/Ag core/shell composite particles were studied.The results showed that the obtained α-Fe2O3/Ag composites were coated completely

well-dispersed and the average sizes were approximately 65 nm

when the dosage of APS was 0.75%(mass) and the volume ratio of alcohol to water was 5∶1.By coating Ag layer，the intensities of SERS were enhanced at 1010 cm-1 and 1038 cm-1.Especially

the signals of Py absorbed on α-Fe2O3/Ag substrate were greatly increased at 1038 cm-1.And this substrate was fairly stable after being placed in air for one month.

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Preparation of α-Fe2O3/Ag core/shell nanocomposites and SERS properties

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Abstract

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Preparation of α-Fe₂O₃/Ag core/shell nanocomposites and SERS properties