Novel synthesis of Pd nanosheets used as highly sensitive SERS substrate for trace fluorescent dye detection 

Tran Thi Bich Quyen1*, Doan Van Hong Thien1, Bui Le Anh Tuan2

1Department of Chemical Engineering, College of Technology, Can Tho University, 3/2 Street, Ninh Kieu District, Can Tho City, 900000, Vietnam

2Department of Civil Engineering, Can Tho University, 3/2 Street, Ninh Kieu District, Can Tho City, 900000, Vietnam

DOI: 10.5185/amlett.2019.2206

Publication Date (Web): Jan 10, 2019

E-mail: ttbquyen@ctu.edu.vn 

Abstract

In this work, a simple and effective method has been developed to synthesize Pd nanosheets that were successfully employed by reducing the Pd salt precursor in N, N-dimethylformamide (DMF), cetyltrimethylammonium bromide (CTAB) and lemon extract in the presence of Tungsten hexacarbonyl with different reaction conditions (e.g., temperature, reaction time). It indicates to be an eco-friendly, simple and novel method for the synthesis, providing a cost-effective and an efficient route for the Pd nanosheets’ synthesis. The Pd nanosheets were characterized by UV-vis spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD). It was also demonstrated that the Pd nanosheets were both highly SERS-active and stable. Results show that Rhodamine 6G (R6G), used as a fluorescent marker, could be detected over a wide concentration range from 10−13 to 10−8 M, with the lower limit of detection being 10−13M.

Keywords

Pd nanosheets (Pd NSs), environmental friendly, lemon extract, Surface-Enhanced Raman Scattering (SERS), rhodamine 6G (R6G).

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