Mercaptopyridine-Functionalized Gold Nanoparticles for Fiber-Optic Surface Plasmon Resonance Hg2+ Sensing

ACS Sensors
Huizhen YuanWei Peng

Abstract

As a highly toxic heavy metal ion, divalent mercuric ion (Hg2+) is one of the most widely diffused and hazardous environmental pollutants. In this work, a simple, portable, and inexpensive fiber-optic sensor based on surface plasmon resonance (SPR) effect was developed for Hg2+ detection, which takes advantage of 4-mercaptopyridine (4-MPY)-functionalized Au nanoparticles (Au NPs/4-MPY) as a signal amplification tag. Based on the coordination between Hg2+ and nitrogen in the pyridine moiety, we developed the sensor by self-assembling 4-MPY on Au film surfaces to capture Hg2+ and then introducing Au NPs/4-MPY to generate a plasmonic coupling structure with the configuration of nanoparticle-on-mirror. The coupling between localized SPR increased changes in SPR wavelength, which allowed highly sensitive Hg2+ sensing in aqueous solution. The sensor exhibited superior selectivity for Hg2+ detection compared with other common metal ions in water. The sensor's Hg2+ detection limit is 8 nM under optimal conditions. Furthermore, we validated the sensor's practicality for Hg2+ detection in tap water samples and demonstrated its potential application for environmental water on-site monitoring.

References

Dec 13, 2002·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Jiawen HuYuguo Fan
May 13, 2003·Environmental Toxicology·Paul B TchounwouDwayne Sutton
Jul 3, 2003·Trends in Biotechnology·Dobrin Nedelkov, Randall W Nelson
Aug 30, 2003·Science·Hugh H HarrisGraham N George
Nov 17, 2005·Journal of the American Chemical Society·Sungho YoonChristopher J Chang
May 12, 2009·Journal of the American Chemical Society·Michael RiskinItamar Willner
Jul 14, 2009·Biosensors & Bioelectronics·Jianlong WangH Susan Zhou
Sep 23, 2009·Optics Express·Marek Piliarik, Jirí Homola
Nov 3, 2009·Biosensors & Bioelectronics·Yuhki YanaseMichihiro Hide
Feb 8, 2011·Journal of the American Chemical Society·Shin Ando, Kazunori Koide
Jun 9, 2011·Chemical Reviews·Kathryn M Mayer, Jason H Hafner
Sep 1, 2005·Environmental Toxicology and Pharmacology·Farhana ZahirRizwan H Khan
Mar 19, 2014·Biosensors & Bioelectronics·Maria Grazia ManeraRoberto Rella
Sep 13, 2014·Biosensors & Bioelectronics·Karel KnezJeroen Lammertyn
Jun 3, 2015·The Analyst·H Yockell-LelièvreJ-F Masson
Dec 27, 2015·Biosensors & Bioelectronics·Anand M ShrivastavBanshi D Gupta
Mar 6, 2016·Biosensors & Bioelectronics·Aleksandra KarczmarczykKarl-Heinz Feller

❮ Previous
Next ❯

Citations

Nov 24, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Meng-Meng PanLi Xu
Nov 5, 2020·Journal of Hazardous Materials·Tania K NaqviPrabhat K Dwivedi
Aug 17, 2020·Environmental Science & Technology·Jieying LiangKang Liang
Nov 2, 2019·Analytical Chemistry·Xu-Dong Wang, Otto S Wolfbeis
Feb 20, 2020·ACS Sensors·Xiaotong GuoLingxin Chen

❮ Previous
Next ❯

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.