Plasmonic nanohole array for enhancing the SERS signal of a single layer of graphene in water

Scientific Reports
Amirreza MahigirGeorgios Veronis

Abstract

We numerically design and experimentally test a SERS-active substrate for enhancing the SERS signal of a single layer of graphene (SLG) in water. The SLG is placed on top of an array of silver-covered nanoholes in a polymer and is covered with water. Here we report a large enhancement of up to 2 × 105 in the SERS signal of the SLG on the patterned plasmonic nanostructure for a 532 nm excitation laser wavelength. We provide a detailed study of the light-graphene interactions by investigating the optical absorption in the SLG, the density of optical states at the location of the SLG, and the extraction efficiency of the SERS signal of the SLG. Our numerical calculations of both the excitation field and the emission rate enhancements support the experimental results. We find that the enhancement is due to the increase in the confinement of electromagnetic fields on the location of the SLG that results in enhanced light absorption in the graphene at the excitation wavelength. We also find that water droplets increase the density of optical radiative states at the location of the SLG, leading to enhanced spontaneous emission rate of graphene at its Raman emission wavelengths.

References

Aug 6, 2009·Optics Express·Robin M ColeJeremy J Baumberg
Sep 10, 2009·Journal of the American Chemical Society·Samuel S R DasaryParesh Chandra Ray
Dec 31, 2009·Nano Letters·Xi LingZhongfan Liu
Mar 20, 2010·Nature·Jian Feng LiZhong Qun Tian
May 14, 2010·Journal of the Royal Society, Interface·Sara Abalde-CelaLuis M Liz-Marzán
Sep 23, 2010·ACS Nano·Fred SchedinAndrea C Ferrari
Jan 20, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Betty C GalarretaFrançois Lagugné-Labarthet
Jun 21, 2012·ACS Nano·Pu WangYa-Hong Xie
Aug 1, 2012·ACS Nano·Sencer AyasAykutlu Dâna
Aug 29, 2013·Chemical Society Reviews·Matthew D SonntagRichard P Van Duyne
Sep 10, 2013·Nano Letters·Xiaolong ZhuN Asger Mortensen
Oct 15, 2013·Scientific Reports·M KhorasaninejadS S Saini
Apr 5, 2012·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Qingzhen HaoTony Jun Huang
Jun 5, 2014·ACS Applied Materials & Interfaces·Paul KühlerTheobald Lohmüller
May 17, 2013·Physical Review Letters·Frerik van BeijnumMartin P van Exter
Mar 31, 2015·Nano Letters·Shengxi HuangMildred S Dresselhaus

❮ Previous
Next ❯

Methods Mentioned

BETA
surface plasmon resonances
surface plasmon resonance

Software Mentioned

Lumerical FDTD Solutions

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.