R6G molecule induced modulation of the optical properties of reduced graphene oxide nanosheets for use in ultrasensitive SPR sensing

Scientific Reports
Tianyu XueXiaoqiang Cui

Abstract

A proper understanding of the role that molecular doping plays is essential to research on the modulation of the optical and electronic properties of graphene. The adsorption of R6G molecules onto defect-rich reduced graphene oxide nanosheets results in a shift of the Fermi energy and, consequently, a variation in the optical constants. This optical variation in the graphene nanosheets is used to develop an ultrasensitive surface plasmon resonance biosensor with a detection limit of 10(-17) M (0.01 fM) at the molecular level. A density functional theory calculation shows that covalent bonds were formed between the R6G molecules and the defect sites on the graphene nanosheets. Our study reveals the important role that defects play in tailoring the properties and sensor device applications of graphene materials.

References

Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Jul 18, 2002·Nature Reviews. Drug Discovery·Matthew A Cooper
Mar 12, 2004·Annual Review of Physical Chemistry·W Knoll
Oct 23, 2004·Science·K S NovoselovA A Firsov
Nov 11, 2005·Nature·K S NovoselovA A Firsov
Feb 13, 2007·Nature Materials·Simone PisanaFrancesco Mauri
Mar 3, 2007·Nature Materials·A K Geim, K S Novoselov
Oct 20, 2007·Nano Letters·Cristina Gómez-NavarroKlaus Kern
Nov 6, 2007·The Journal of Organic Chemistry·Daniel P HagbergLicheng Sun
Dec 7, 2007·Nature Materials·Jeroen B OostingaLieven M K Vandersypen
Apr 7, 2010·Physical Review Letters·M M UgedaJ M Gómez-Rodríguez
Oct 16, 2010·Journal of the American Chemical Society·Hyeon-Jin ShinYoung Hee Lee
Feb 18, 2012·Nano Letters·Elizabeth S ThrallLouis E Brus
Aug 21, 2012·Scientific Reports·Ruitao LvMauricio Terrones
Feb 14, 2013·Chemical Society Reviews·Chun Kiang Chua, Martin Pumera
Mar 5, 2013·ACS Applied Materials & Interfaces·Tianyu XueWeitao Zheng
Sep 23, 2014·Nature Communications·Poya YasaeiAmin Salehi-Khojin

❮ Previous
Next ❯

Citations

Oct 21, 2016·Physical Chemistry Chemical Physics : PCCP·Kan ZhangWeitao Zheng
May 27, 2020·Chemical Communications : Chem Comm·Tianyu XueXiaoqiang Cui
Aug 17, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Muhammad JunaidFahad Usman
Jan 25, 2018·ACS Applied Materials & Interfaces·Pooja SainiAjit K Mahapatro

❮ Previous
Next ❯

Methods Mentioned

BETA
chip
atomic force microscopy

Software Mentioned

Materials
Dmol3
Studio

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.