Dual functional PDMS sponge SERS substrate for the on-site detection of pesticides both on fruit surfaces and in juice

The Analyst
Ji SunMeikun Fan

Abstract

In this study, a versatile dual-functional polydimethylsiloxane (PDMS) sponge Surface Enhanced Raman Scattering (SERS) substrate has been fabricated for the on-site detection of pesticide residues both on the surface and in solution with minimum or no sample pretreatment. The PDMS sponge was fabricated using white granulated sugar and soft white sugar as pore-forming reagents. Later, multiple rounds of Ag NP deposition were performed by incubating the PDMS sponge in the Ag NP solution with the help of 3-mercaptopropyltrimethoxysilane (APTMS). The highest SERS enhancement was achieved through 2 rounds of Ag NP deposition. Under optimum conditions, with Rhodamine 6G (R6G) as the probe molecule, the limit of detection (LOD) reached 2 femtomoles (20 μL at a concentration of 100 pM). The analytical performance for potential on-site applications of the substrate has been demonstrated with pesticide-spiked agricultural products taken as examples. Without sample pretreatment, the pesticide triazophos and methyl parathion were successfully detected by swabbing on the fruit surface with LODs of 0.79 ng and 1.58 ng, respectively. In addition, the lowest detected concentrations of triazophos and methyl parathion in fruit juice were found t...Continue Reading

References

Aug 30, 2005·Biosensors & Bioelectronics·Aziz AmineGiuseppe Palleschi
Oct 4, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Christopher J Addison, Alexandre G Brolo
Aug 20, 2009·Physical Chemistry Chemical Physics : PCCP·Pablo G Etchegoin
Aug 20, 2009·Physical Chemistry Chemical Physics : PCCP·Meikun Fan, Alexandre G Brolo
Jan 29, 2010·Small·Ramón A Alvarez-Puebla, Luis M Liz-Marzán
Mar 20, 2010·Nature·Jian Feng LiZhong Qun Tian
Dec 7, 2010·ACS Applied Materials & Interfaces·Chang H LeeSrikanth Singamaneni
Jun 10, 2011·International Journal of Environmental Research and Public Health·Christos A Damalas, Ilias G Eleftherohorinos
Nov 15, 2011·ACS Applied Materials & Interfaces·Sung-Jin ChoiYang-Kyu Choi
May 9, 2012·ACS Nano·R H FarahiT Thundat
May 25, 2012·Proceedings of the National Academy of Sciences of the United States of America·Weigao XuJin Zhang
Feb 13, 2013·Physical Chemistry Chemical Physics : PCCP·Hai-Xin LinBin Ren
Dec 4, 2013·Journal of Agricultural and Food Chemistry·Eiki WatanabeYasuhiro Yogo
Dec 3, 2014·ACS Applied Materials & Interfaces·Zhengjun GongMeikun Fan
Dec 23, 2014·Chemical Communications : Chem Comm·Meikun FanAlexandre G Brolo

❮ Previous
Next ❯

Methods Mentioned

BETA
enzyme-linked immunosorbent assay

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.