Robotic written silver ink on photographic paper for detection of thiram residues in fruits

Feng, Longxiu; Duan, Junli; Wang, Kun; Huang, Lei; Xiao, Guoqing

doi:10.1016/j.saa.2021.120724

Cited by 8 publications

(3 citation statements)

References 27 publications

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“…The excessive and prolonged use of pesticides is becoming one of potentially toxic sources to damage human health. , Recently, the application of flexible SERS substrates for detecting pesticides on the surface of agricultural products (e.g., fruits, vegetables, and fishes) and pesticides in the liquid foods (e.g., fruit juice) has attracted much attention, ,,,,, especially 3D spongy flexible substrates for in situ extraction of pesticides. ,, Herein, thiram was selected as a characteristic pesticide for studying the application of the spongy flexible bPEI/AgNPs SERS substrate because thiram has been widely used as a protective fungicide in the agriculture field. , …”

Section: Results and Discussionmentioning

confidence: 99%

“…12,13,48 Herein, thiram was selected as a characteristic pesticide for studying the application of the spongy flexible bPEI/AgNPs SERS substrate because thiram has been widely used as a protective fungicide in the agriculture field. 16,47 The thiram molecule consists of two planar dimethyldithiocarbamate (DMDTC) units, (CH 3 ) 2 NC(S)S−, linked through a disulfide (S−S) bond (Figure 7). In contrast with the Raman spectrum of the thiram powder (Figure 7a), the Raman shifts and intensities of some bands change in the SERS spectra of the bPEI/AgNPs-1.0 substrate absorbing thiram (Figure 7b−d), and their Raman signals are summarized in Table S6 according to the literature.…”

Section: Sers Effect Of Bpei/agnps Composites For Thirammentioning

confidence: 99%

See 1 more Smart Citation

Silver Nanoparticles-Loaded Cross-Linking Branched Polyethylenimine as a Spongy Flexible Substrate for Surface-Enhanced Raman Spectroscopy

Shen,

Wu,

et al. 2024

ACS Appl. Polym. Mater.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Sers Effect Of Bpei/agnps Composites For Thirammentioning

confidence: 99%

Silver Nanoparticles-Loaded Cross-Linking Branched Polyethylenimine as a Spongy Flexible Substrate for Surface-Enhanced Raman Spectroscopy

Shen,

Wu,

et al. 2024

ACS Appl. Polym. Mater.

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“…For particle-free silver inks, the sintering temperature is usually in the ranges from 90℃ to 200℃. Moreover, particle-free silver inks possess strong stability due to the absence of unstable metal nanoparticles, which ensures that the molecular-based inks do not block the printing equipment and can be applied in a variety of flexible substrates [9,10] . With the development of conductive metal inks, inkjet printing and dispenser methods have been gradually adopted to print metal electrodes during the past few years.…”

Section: Introductionmentioning

confidence: 99%

Direct Writing Highly Conductive Silver Pattern on Flexible Substrate Based on Particle-Free and Ionic Liquid-Assisted Ink

Xie,

Wu,

Pan

et al. 2024

J. Phys.: Conf. Ser.

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Particle-free silver inks have the advantage of low sintering temperature, high stability, and easy synthesis over traditional nanoparticle-based silver inks, which have been widely applied in the printing electronic industry. In this paper, we develop a novel particle-free and ionic liquid-assisted silver ink consisting of silver acetate and formic acid/iso-propanolamine liquid that can be used to print highly conductive silver patterns at low sintering temperatures. A variety of continuous and consistent silver circuits with a resistivity of 7.7 µΩ·cm can be printed by a dispenser machine, which is only 4.8 times bulk silver. Furthermore, the low-resistivity silver patterns can be also printed on the flexible polyimide foil, which maintains the stability of resistivity and mechanical properties after bending multiple times, demonstrating that our ionic liquid-assisted silver ink can be applied in flexible electronic devices. Besides, our particle-free silver ink can be utilized to write electric circuits directly with a ball-point pen.

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One‐step synthesis of a spongy flexible substrate for surface enhanced Raman spectroscopy comprising a silver nanoparticles‐loaded poly(amidoamine) dendrimer crosslinked with glutaraldehyde

Shen,

Wu,

et al. 2024

Journal of Polymer Science

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A composite comprising a silver nanoparticles‐loaded poly(amidoamine) (PAMAM) dendrimer crosslinked with glutaraldehyde (PAMAM/AgNPs) is synthesized using a one‐step method under vortex at room temperature. The structure of glutaraldehyde‐crosslinked PAMAM dendrimer is characterized using FTIR and high‐resolution magic angle spinning–carbon 13 nuclear magnetic resonance (HRMAS 13C NMR) spectroscopy. The crosslinking structure ensures the uniformity and stability of the Ag nanoparticles, and the flexibility of the PAMAM/AgNPs composite. X‐ray diffraction (XRD) analysis and energy dispersive spectroscopy (EDS) confirm the formation of Ag nanoparticles in the PAMAM/AgNPs composite. Scanning electron microscopy (SEM) and three‐dimensional (3D) micro‐Raman images reveal the coarsely porous 3D micro‐structure of the PAMAM/AgNPs composite. This unique micro‐3D architecture provides the PAMAM/AgNPs composite with spongy flexibility and a swab‐like nature, which is advantageous for the rapid and effective absorption of liquid samples on the surfaces of objects. Surface enhanced Raman spectroscopy (SERS) indicates that the detection limits of both rhodamine 6G (R6G) and thiram are 1.0 × 10−5 mol L−1, and the SERS enhancement factor of R6G is determined to be 1.35 × 104. The spongy flexible PAMAM/AgNPs SERS substrate therefore has potential for use in Raman active compound detection.

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Robotic written silver ink on photographic paper for detection of thiram residues in fruits

Cited by 8 publications

References 27 publications

Silver Nanoparticles-Loaded Cross-Linking Branched Polyethylenimine as a Spongy Flexible Substrate for Surface-Enhanced Raman Spectroscopy

Silver Nanoparticles-Loaded Cross-Linking Branched Polyethylenimine as a Spongy Flexible Substrate for Surface-Enhanced Raman Spectroscopy

Direct Writing Highly Conductive Silver Pattern on Flexible Substrate Based on Particle-Free and Ionic Liquid-Assisted Ink

One‐step synthesis of a spongy flexible substrate for surface enhanced Raman spectroscopy comprising a silver nanoparticles‐loaded poly(amidoamine) dendrimer crosslinked with glutaraldehyde

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