Growth time dependency on the formation of gold nanobipyramids for efficient detection towards chlorpyrifos-based LSPR sensor

Nafisah, Suratun; Morsin, Marlia; Iwantono, Iwantono; Sanudin, Rahmat; Mohd Zain, Zainiharyati; Satria, Lusiana; Razali, Nur Liyana; Mardiansyah, Dedi

doi:10.1016/j.ijleo.2023.171270

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…In contrast, electrochemical methods based on a disposable screen-printed carbon electrode (SPCE) offer an excellent alternative option for onsite pesticide detection owing to their rapid, low-cost, simple operation, versatility, and high sensitivity. − Meanwhile, the employment of different shapes of gold nanoparticles via nanospheres, − nanorods, − nanocubes, − nanostars, − nanocages, − nanotriangles, − nanohexagon, − and nanobipyramids − has been widely explored to enhance its sensitivity for the purpose of sensing applications. Among these various shapes of gold nanoparticles, gold nanorods (AuNRs) have attracted considerable attention due to their anisotropic structures and high surface area that could facilitate faster electron transfer capability on the electrode surface .…”

Section: Introductionmentioning

confidence: 99%

Effect of Aspect Ratio of a Gold-Nanorod-Modified Screen-Printed Carbon Electrode for Carbaryl Detection in Three Different Samples of Vegetables

Wahyuni,

Putra,

Rahman

et al. 2023

ACS Omega

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In this study, three different sizes of gold nanorods (AuNRs) were synthesized using the seed-growth method by adding various volumes of AgNO 3 as 400, 600, and 800 μL into the growth solution of gold nanoparticles. Three different sizes of AuNRs were then characterized using UV−vis spectroscopy, highresolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED) patterns, and atomic force microscopy (AFM) to investigate the surface morphology, topography, and aspect ratios of each synthesized AuNR. The aspect ratios from the histogram of size distributions of three AuNRs as 2.21, 2.53, and 2.85 can be calculated corresponding to the addition of AgNO 3 volumes of 400, 600, and 800 μL. Moreover, each AuNR in three different aspect ratios was drop-cast onto the surface of a commercial screen-printed carbon electrode (SPCE) to obtain three different SPCE-modified AuNRs (SPCE-A400, SPCE-A600, and SPCE-A800, respectively). All SPCE-modified AuNRs were then evaluated for their electrochemical behavior using cyclic voltammetry and electrochemical impedance spectroscopy (EIS) techniques and the highest electrochemical performance was shown as the order of magnitude of SPCE-A400 > SPCE-A600/SPCE-A800. The reason for the highest electrocatalytic activity of SPCE-A400 might be due to the smallest particle size and uniform distribution of AuNRs ∼ 2.2, which enhanced the charge transfer, thus providing the highest electroactive surface area (0.6685 cm 2 ) compared to other electrodes. These results also confirm that the sensing mechanism for all SPCE-modified AuNRs is controlled by diffusion phenomena. In addition, the optimum pH was obtained as 4 for carbaryl detection for all SPCE-modified AuNRs with the highest current shown by SPCE-A400. Furthermore, SPCE-A400 has the highest fundamental parameters (surface coverage, catalytic rate constant, electron transfer rate constant, and adsorption capacity) for carbaryl detection, which were investigated using cyclic voltammetry and chronoamperometric techniques. The electroanalytical performances of all SPCE-modified AuNRs for carbaryl detection were also investigated with SPCE-A400 displaying the best performance among other electrodes in terms of its linearity (0.2−100 μM), limit of detection (LOD) ∼ 0.07 μM, and limit of quantification (LOQ) ∼ 0.2 μM. All SPCE-modified AuNRs were also subsequently evaluated for their stability, reproducibility, and selectivity in the presence of interfering species such as NaNO 2 , NH 4 NO 3 , Zn(CH 3 CO 2 ) 2 , FeSO 4 , diazinon, and glucose and show reliable results as depicted from %RSD values less than 3%. At last, all SPCE-modified AuNRs have been employed for carbaryl detection using a standard addition technique in three different samples of vegetables (cabbage, cucumber, and Chinese cabbage) with its results (%recovery ≈ 100%) within the acceptable analytical range. In conclusion, this work demonstrates the great potential of a disposable device based on an AuNR-modified SPCE for rapid detection and high ...

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Section: Introductionmentioning

confidence: 99%

Effect of Aspect Ratio of a Gold-Nanorod-Modified Screen-Printed Carbon Electrode for Carbaryl Detection in Three Different Samples of Vegetables

Wahyuni,

Putra,

Rahman

et al. 2023

ACS Omega

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Gold Nanoparticle‐Based Sensing of Pesticides and Fertilizers in Aqueous System: A Review

Salsabiila,

Morsin,

Razali

et al. 2024

Physica Status Solidi (a)

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The extensive use of pesticides and fertilizers in agriculture has led to significant environmental pollution, particularly in aqueous systems. This review provides an inclusive overview of the advancements in the application of gold nanoparticles (GNPs), specifically for the sensing of pesticides and fertilizers on surface water. The novelty of this work lies in its focused analysis of the unique localized surface plasmon resonance properties of GNPs that enable highly sensitive and selective detection of contaminants on surface water. Various synthesis methods and detection mechanisms are discussed, emphasizing the integration of GNP‐based sensors with modern analytical techniques to enhance detection limits and response time. The review also highlights the significance of monitoring agricultural chemicals in water systems from an environmental perspective. In addition, this review also reveals the potential of GNPs contribution toward sustainable agricultural practices by providing reliable, rapid, and cost‐effective sensing solutions. Future perspectives on the development of GNP‐based sensors, including the fundamental challenges in designing GNP sensors, such as incorporation with other materials, miniaturized and portable sensing devices, and field‐testing validation are also presented.

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Growth time dependency on the formation of gold nanobipyramids for efficient detection towards chlorpyrifos-based LSPR sensor

Cited by 2 publications

References 30 publications

Effect of Aspect Ratio of a Gold-Nanorod-Modified Screen-Printed Carbon Electrode for Carbaryl Detection in Three Different Samples of Vegetables

Effect of Aspect Ratio of a Gold-Nanorod-Modified Screen-Printed Carbon Electrode for Carbaryl Detection in Three Different Samples of Vegetables

Gold Nanoparticle‐Based Sensing of Pesticides and Fertilizers in Aqueous System: A Review

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