Carboxymethyl chitosan/graphene oxide/silver nanotriangles nanohybrid as the sensing materials for the enhancement of ammonia localized surface plasmon resonance sensor

Azeman, Nur Hidayah; Bakar, Mohd Hafiz Abu; Nazri, Nur Afifah Ahmad; Mobarak, Nadhratun Naiim; Khushaini, Muhammad Asif Ahmad; Aziz, Tengku Hasnan Tengku Abdul; Zain, Ahmad Rifqi Md; Bakar, Ahmad Ashrif A

doi:10.1016/j.optlastec.2021.107789

Cited by 14 publications

(6 citation statements)

References 36 publications

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“…Succinyl-carrageenan has a higher density of electronegative atoms than pristine carrageenan, which contributed to this. 2,7…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the AgNP-succinyl-carrageenan optical fiber sensor produces an unstable repeatability of 5 times due to the uncontrolled ambient environment such as temperature that could affect the results since the LSPR sensor is sensitive to the change of the surrounding temperature. 9…”

Section: Resultsmentioning

confidence: 99%

“…Succinyl-carrageenan has a higher density of electronegative atoms than pristine carrageenan, which contributed to this. 2,7 Detection of NH 4 + using a fiber probe properties. The reaction time for the LSPR optical fibers coated with AgNPs and AgNP-carrageenan was 3 minutes to produce a stable reflection reading.…”

Section: Resultsmentioning

confidence: 99%

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Succinyl-carrageenan on a localised surface plasmon resonance fiber sensor for ammonium ion assays

et al. 2022

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“…Succinyl-carrageenan has a higher density of electronegative atoms than pristine carrageenan, which contributed to this. 2,7…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Succinyl-carrageenan on a localised surface plasmon resonance fiber sensor for ammonium ion assays

et al. 2022

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“…Compared with spherical or quasi-spherical AgNPs, the triangular AgNPs exhibited sharp corners resulting in a redshift of reflectance peaks. However, multiple modes of triangular AgNPs can be present simultaneously, which leads to the less pronounced redshift reflectance peaks [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

Chlorophyll Detection by Localized Surface Plasmon Resonance Using Functionalized Carbon Quantum Dots Triangle Ag Nanoparticles

et al. 2022

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An optical sensor-based localized surface plasmon resonance (LSPR) sensor was demonstrated for sensitive and selective chlorophyll detection through the integration of amino-functionalized carbon quantum dots (NCQD) and triangle silver nanoparticles (AgNPs). The additions of amino groups to the CQD enhance the detection of chlorophyll through electrostatic interactions. AgNPs-NCQD composite was fabricated on the surface of the silanized glass slide using the self-assembly technique. The experimental results showed that the AgNPs-NCQD film-based LSPR sensor detects better than AgNPs and AgNPs-CQD films with a good correlation coefficient (R2 = 0.9835). AgNPs-NCQD showed a high sensitivity response of 2.23 nm ppm−1. The detection and quantification limits of AgNPs-NCQD are 1.03 ppm and 3.40 ppm, respectively, in the range of 0.05 to 6 ppm. Throughout this study, no significant interference was observed among the other ionic species (NO2−, PO4−, NH4+, and Fe3+). This study demonstrates the applicability of the proposed sensor (AgNPs-NCQD) as a sensing material for chlorophyll detection in oceans.

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“…Surface plasmon resonance (SPR) is also a sensing mechanism, and sensors based on SPR through the interaction between the sensing element and the metasurfaces [ 60 , 61 ]. This mechanism is through the target biochemical molecule binding, molecules concentration changes and chemical changes lead to changes in the local refractive index gradient, which excites the excitation of the surface plasma, generating terahertz waves through the frequency shift of the resonance peak.…”

Section: Fundamental Theoretical Aspects In the Terahertz Metasurface...mentioning

confidence: 99%

Advances in terahertz metasurface graphene for biosensing and application

Yang

You

2023

Discover Nano

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Based on the extraordinary electromagnetic properties of terahertz waves, such as broadband, low energy, high permeability, and biometric fingerprint spectra, terahertz sensors show great application prospects in the biochemical field. However, the sensitivity of terahertz sensing technology is increasingly required by modern sensing demands. With the development of terahertz technology and functional materials, graphene-based terahertz metasurface sensors with the advantages of high sensitivity, fingerprint identification, nondestructive and anti-interference are gradually gaining attention. In addition to providing ideas for terahertz biosensors, these devices have attracted in-depth research and development by scientists. An overview of graphene-based terahertz metasurfaces and their applications in the detection of biochemical molecules is presented. This includes sensor mechanism research, graphene metasurface index evaluation, protein and nucleic acid sensors, and other chemical molecule sensing. A comparative analysis of graphene, nanomaterials, silicon, and metals to develop material-integrated metasurfaces. Furthermore, a brief summary of the main performance results of this class of devices is presented, along with suggestions for improvements to the existing shortcoming.

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Carboxymethyl chitosan/graphene oxide/silver nanotriangles nanohybrid as the sensing materials for the enhancement of ammonia localized surface plasmon resonance sensor

Cited by 14 publications

References 36 publications

Succinyl-carrageenan on a localised surface plasmon resonance fiber sensor for ammonium ion assays

Succinyl-carrageenan on a localised surface plasmon resonance fiber sensor for ammonium ion assays

Chlorophyll Detection by Localized Surface Plasmon Resonance Using Functionalized Carbon Quantum Dots Triangle Ag Nanoparticles

Advances in terahertz metasurface graphene for biosensing and application

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