Effect of additive acid on seeded growth of gold nanobipyramids

Nafisah, Suratun; Morsin, Marlia; Sanudin, Rahmat; Nayan, Nafarizal; Yusop, Mohd Zamri Mohd; Razali, Nur Liyana; Shah, Nur Zehan An’nisa Md

doi:10.1016/j.jpcs.2020.109764

Cited by 11 publications

(5 citation statements)

References 49 publications

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“…2(a). This color is consistent with previous research [17], which said that a color change indicates a nanoseeds size of 4 nm. Meanwhile, the solution changed color to purple for the growth process, as shown in Fig.…”

Section: Synthesis Of Gnbpssupporting

confidence: 93%

Thiol Functionalized Gold Nanobipyramids-Based Plasmonic Sensor for Glucose Detection

Salsabiila,

Morsin,

Hasbullah

et al. 2024

IIUMEJ

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Gold nanobipyramids (GNBPs) have high selectivity in detecting changes in their surrounding medium because of their electric field enhancements and larger surface areas. In this study, we functionalized GNBPs using a thiol group that acts as a ligand to improve the detection performance of the analytes. The investigation is carried out by varying the functionalization periods from 12 to 72 hours. The optimum thiol-functionalized GNBPs (t-GNBPs) are obtained in 60 hours, with a length of 36.84 ± 2.05 nm, a width of 24.02 ± 0.74 nm, and an aspect ratio of 1.54 ± 0.11. Then, the optimum t-GNBPs are used as a sensing material in a plasmonic sensor to detect glucose. The limit of detection (LoD) of glucose is 1 µM for this sensor. The plasmonic sensor has been successfully built with reliable performance in detecting glucose with excellent linearity, sensitivity and R2 = 1; good selectivity compared to four similar chemical structure analytes; high stability with a low error value, i.e., ± 0.02 a.u.; and almost consistent repeatability values in each cycle with low percent variance of 0.000025% for the t-SPR area and 0.000032% for the l-SPR area. Therefore, a plasmonic sensor based on t-GNBPs is an alternative method of detecting glucose with high sensitivity, selectivity and repeatability. ABSTRAK: Nanobipiramid Emas (GNBPs) memiliki selektiviti yang tinggi dalam mengesan perubahan medium sekitar kerana memiliki peningkatan medan elektrik dan luas permukaan yang besar. Kajian ini merupakan fungsionalisasi terhadap GNBPs dengan menggunakan kumpulan thiol sebagai ligan bagi meningkatkan prestasi pengesanan analit. Kajian ini dilakukan dengan mempelbagaikan tempoh masa fungsionalisasi dalam julat waktu 12 hingga 72 jam. GNBPs optimum yang difungsionalisasi oleh thiol (t-GNBPs) diperoleh pada 60 jam, dengan panjang 36.84 ± 2.05 nm, lebar 24.02 ± 0.74 nm, dan nisbah aspek 1.54 ± 0.11. Kemudian, t-GNBPs optimum digunakan sebagai bahan penderia pada sensor plasmonik bagi mengesan glukosa. Limit pengesanan glukosa (LoD) bagi sensor ini adalah sebanyak 100 µM. Sensor plasmonik telah berhasil dibangunkan dengan kecekapan boleh percaya dalam mengesan glukosa dengan lineariti dan sensitiviti sebanyak R2 = 1. Pemilihan yang baik dibandingkan dengan 4 analit yang sama dari segi struktur kimia. Kestabilan yang tinggi dengan nilai ralat rendah iaitu ± 0.02 a.u, dan memiliki nilai keberulangan yang hampir konsisten pada setiap kitar dengan peratusan varian rendah iaitu sebanyak 0.000025% bagi bahagian t-SPR dan 0.000032% bagi l-SPR. Oleh itu, pengesan plasmonik berdasarkan t-GNBPs ini adalah kaedah alternatif bagi mengesan glukosa dengan sensitiviti, selektiviti, dan kebolehulangan yang tinggi.

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Section: Synthesis Of Gnbpssupporting

confidence: 93%

Thiol Functionalized Gold Nanobipyramids-Based Plasmonic Sensor for Glucose Detection

Salsabiila,

Morsin,

Hasbullah

et al. 2024

IIUMEJ

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“…The statistical analysis of AuNBPs’ size showed that AuNBPs grew under the L-channel mode and H-channel mode had a similar length and width when they had a same λ LLSPR (Figure C). Previous studies have reported that different types of Au nanoparticles may be yielded by adjusting the pH of the growth solution with a constant AA concentration. , However, our above results revealed that HCl concentration only affects the growth rate of NADH-AA-mediated AuNBPs, but does not alter the growth pattern of AuNBPs. This novel insight makes AuNBPs a promising signal molecule for developing dual-channel multicolor assay.…”

Section: Resultscontrasting

confidence: 59%

Regulating the Growth Rate of Gold Nanobipyramids via a HCl-NADH-Ascorbic Acid System toward a Dual-Channel Multicolor Colorimetric Immunoassay for Simultaneously Screening and Detecting Multiple Sulfonamides

Wang

Zhang

et al. 2023

Anal. Chem.

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It is an urgent need to develop simple and high-throughput methods for simultaneously screening and detecting multiple or groups of sulfonamides (SAs) in animal-derived foods since various SAs were alternately used in animal husbandry to avoid generating drug resistance. We herein developed a novel HCl-reduced nicotinamide adenine dinucleotide I (NADH)-ascorbic acid (AA)-mediated gold nanobipyramids (AuNBPs) growth system, which can precisely regulate the growth rate of AuNBPs, to generate two colorful and stable AA-corresponding multicolor signal channels with different sensitivities. Based on the HCl-NADH-AA-mediated AuNBP growth system, we further developed a dual-channel multicolor immunoassay for simultaneously realizing rapid screening and detection of 5 SAs (sulfamethazine, sulfamethoxydiazine, sulfisomidine, sulfamerazine, and sulfamonomethoxine) by using a paper-based analytical device for sensitively and stably reading out the signal and a broad-specificity anti-SAs antibody as a bio-receptor. The developed immunoassay has more color changes, a wider linear range, excellent specificity and stability, and two multicolor signal channels (L-channel and H-channel) with different sensitivities. The H-channel exhibited 7–8 SAs-corresponding color changes and can be used to detect 5 target SAs with a visual detection limit of 0.1–0.5 ng/mL and a spectrometry detection limit of 0.05–0.16 ng/mL. The L-channel exhibited 7–9 SAs-corresponding color changes and can be used to detect 5 target SAs with a visual detection limit of 2.0–6.0 ng/mL and a spectrometry detection limit of 0.40–1.47 ng/mL. The developed immunoassay was successfully used to simultaneously screen and detect low-concentration and high-concentration of target SAs in milk and fish muscle samples with a recovery of 85–110% and an RSD (n = 5) < 8%. The visual detection limit of our immunoassay is much lower than the maximum residue limit of total SAs in edible tissue. All above features make our immunoassay a promising assay for simultaneously realizing the rapid screening and quantitative determination of multiple SA residues in food by bare eye observation. It must be mentioned that our immunoassay may be expended as a general method for the simultaneous visual screening and detection of other drugs using the corresponding antibody as a recognition probe.

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“…AuNBP synthesis was carried out using the SMG method as previously reported [4][5][6][7][8][9][10]. Seeding was carried out by providing 5 ml of 0.01M HAuCl4 solution mixed with 9.75 ml of a 0.1 M CTAB solution, followed by adding 0.9 ml of 0.01 M NaBH4 solution were added which had been cooled and then left for 2 hours and 0.1 ml of 0.01 M H2PtCl4.…”

Section: Synthesismentioning

confidence: 99%

Application of Anisotropic Gold Nanomaterials in Plasmonic Sensors for Detection of Glyphosate

Iwantono,

Saputra,

Taufik Hidayat

et al. 2023

J. Phys.: Conf. Ser.

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The trend of using agrochemicals is increasing, especially glyphosate-based herbicides (GBH). The application of toxic chemicals as pest control in food crops carries a risk to human safety. Therefore, it is important to create a sensor for detection through Localized Surface Plasmon Resonance (LSPR) by utilizing anisotropic gold nanoparticles (AGN) to detect the presence of GBH contaminants in the form of malathion and temephos, with a detection level as low as three-part per million (ppm). AGN-based LSPR is successfully synthesized through an experimental technique using the Seed Mediated Growth Method (SMGM). The UV-Vis response showed two strong absorbances with a peak occurring around 500 to 600 nm, the peak within the transverse surface plasmon resonance range (t-SPR) corresponds to one aspect, while the peak within the spectral range extending from 700 nm to 900 nm corresponds to another aspect, namely Longitudinal Surface Plasmon Resonance (l-SPR). Anlysis of the FESEM photograph shows a structure consisting of two particles with different shapes, pentagonal pyramids and a bone shape. Pentagonal pyramids joined with a surface density of 64.43 ± 1,53 % and bone shape of 32,46 ± 1.53 %. This characterization shows strong and distinctive optical resonance in the near-infrared visible light spectrum, which is very suitable for LSPR sensors. It is necessary to fabricate an LSPR sensor device capable of detecting the presence of GBH by testing sensitivity, stability and repeatability. The sensitivity test results were evaluated by varying the synthesis time and concentration of contaminants in the AGN growth solution. It confirmed that the AGN-based LSPR sensor has a promising potential for GBH residue detection.

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Effect of additive acid on seeded growth of gold nanobipyramids

Cited by 11 publications

References 49 publications

Thiol Functionalized Gold Nanobipyramids-Based Plasmonic Sensor for Glucose Detection

Thiol Functionalized Gold Nanobipyramids-Based Plasmonic Sensor for Glucose Detection

Regulating the Growth Rate of Gold Nanobipyramids via a HCl-NADH-Ascorbic Acid System toward a Dual-Channel Multicolor Colorimetric Immunoassay for Simultaneously Screening and Detecting Multiple Sulfonamides

Application of Anisotropic Gold Nanomaterials in Plasmonic Sensors for Detection of Glyphosate

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