A label-free graphene-based nanosensor using surface plasmon resonance for biomaterials detection

Farmani, Homa; Farmani, Ali; Biglari, Zeinab

doi:10.1016/j.physe.2019.113730

Cited by 95 publications

(22 citation statements)

References 68 publications

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“…Surface Plasmon Resonance (SPR) sensors are well known optical platforms for label-free sensing and testing applications. They are widely used in industrial and research labs for different purposes such as gas sensing [1,2], chemical sensing [3], colorimetric sensor [4], and bio-materials identification [5]. In most of the commercially available SPR devices, the excitation of SPR is based on a Kretschman configuration, which requires light-prism coupling under oblique incidence [6].…”

Section: Introductionmentioning

confidence: 99%

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Narrow Absorption in ITO-Free Perovskite Solar Cells for Sensing Applications Analyzed through Electromagnetic Simulation

2019

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This work reports on a computational analysis of how a modified perovskite cell can work as a refractometric sensor by generating surface plasmon resonances at its front surface. Metal-dielectric interfaces are necessary to excite plasmonic resonances. However, if the transparent conductor (ITO) is replaced by a uniform metal layer, the optical absorption at the active layer decreases significantly. This absorption enhances again when the front metallic surface is nanostructured, adding a periodic extruded array of high aspect-ratio dielectric pyramids. This relief excites surface plasmon resonances through a grating coupling mechanism with the metal surface. Our design allows a selective absorption in the active layer of the cell with a spectral response narrower than 1 nm. The photo-current generated by the cells becomes the signal of the sensor. The device employs an opto-electronic interrogation method, instead of the well-known spectral acquisition scheme. The sensitivity and figure of merit (FOM) parameters applicable to refractometric sensors were adapted to this new situation. The design has been customized to sense variations in the index of refraction of air between 1.0 and 1.1. The FOM reaches a maximum value of 1005 RIU − 1 , which is competitive when considering some other advantages, as the easiness of the acquisition signal procedure and the total cost of the sensing system. All the geometrical and material parameters included in our design were selected considering the applicable fabrication constrains.

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Section: Introductionmentioning

confidence: 99%

“…Sci. 2019, xx,5 5 of (a) Optical absorption in the active layer and top contact along with the total absorption of the whole device for the planer perovskite solar cells having ITO or Ag contact without the grating. (b) Spectral reflection for this two planer cases without grating.…”

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confidence: 99%

Narrow Absorption in ITO-Free Perovskite Solar Cells for Sensing Applications Analyzed through Electromagnetic Simulation

2019

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“…The FDTD method is also used to solve Maxwell's equation and study the waveguide's light propagation. The following equation gives the optical absorption of graphene [74] …”

Section: Mathematical Backgroundmentioning

confidence: 99%

Ultra-fast tunable optoelectronic half adder/subtractor based on photonic crystal ring resonators covered by graphene nanoshells

Naghizade

Saghaei

2021

Opt Quant Electron

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This paper reports a new design of a tunable optoelectronic half adder/subtractor. Two photonic crystal (PhC) ring resonators are used to realize the proposed structure. Several silicon rods surrounded by silica rods covered with graphene nanoshells (GNSs) form every PhC ring resonator. Setting the chemical potential of GNS with an appropriate gate voltage, we can tune the PhC resonant mode as desired. The plane wave expansion technique is used to study the photonic band structure of the fundamental PC microstructure, and the finitedifference time-domain method is employed in the final design for solving Maxwell's equations to analyze the light propagation inside the structure. We systematically study the effects of physical parameters on the transmission reflection and absorption spectra. By optimizing the geometric dimensions, resonant absorption peaks can be excited at the same time for GNSs. Our numerical results also reveal the maximum time response is about 0.8 ps. The 200 µm 2 area of the proposed half adder/subtractor makes it the building block of every photonic integrated circuit. Also, the design of various fast signal processing systems in optical communication networks is possible due to using tunable GNSs in PhC ring resonators. This study can introduce the use of two-dimensional materials in the design and implementation of logic circuits.

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“…Based on the target recognition events, biosensor receptors are included. Based on the transduction mechanisms, biosensors can be classified into optical biosensor (Raman scattering [39][40][41][42][43][44], surface plasmon resonance (SPR) [6,[45][46][47], fiber Bragg grating [48][49][50][51][52][53], fluorescent [54-58], chemiluminescence [36,59]), electrochemical biosensor [60][61][62][63][64], calorimetric biosensor [6,22,[65][66][67][68][69], and piezoelectric biosensor [70][71][72][73][74].…”

Section: The Present Of Microfluidic-integrated Biosensorsmentioning

confidence: 99%

Application of Microfluidics in Biosensors

Wang¹,

Ren²,

Zhang³

2020

Advances in Microfluidic Technologies for Energy and Environmental Applications

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A label-free graphene-based nanosensor using surface plasmon resonance for biomaterials detection

Cited by 95 publications

References 68 publications

Narrow Absorption in ITO-Free Perovskite Solar Cells for Sensing Applications Analyzed through Electromagnetic Simulation

Narrow Absorption in ITO-Free Perovskite Solar Cells for Sensing Applications Analyzed through Electromagnetic Simulation

Ultra-fast tunable optoelectronic half adder/subtractor based on photonic crystal ring resonators covered by graphene nanoshells

Application of Microfluidics in Biosensors

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