Molecularly imprinted sol-gel/Au@Ag core-shell nano-urchin localized surface plasmon resonance sensor designed in reflection mode for detection of organic acid vapors

Chen, Bin; Guo, Hongchen; Liu, Chuanjun; Shang, Liang; Ye, Xiao; Chen, Lin; Feng, Changhao; Hayashi, Kenshi

doi:10.1016/j.bios.2020.112639

Cited by 20 publications

(12 citation statements)

References 37 publications

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“…47 In our previous work, PCA and LDA were both performed to discriminate between carboxylic acid vapors, volatile aldehydes, and plant VOCs. 45,47,49 The results showed that LDA can realize clearer discrimination than PCA. Other studies have also proven that the LDA model is more suitable for pattern information extraction in gas-sensing applications.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In contrast, LDA, as a supervised classification method, is a linear combination of the original variables to construct a discriminant function to maximize the variance between groups and minimize the variance within the groups . In our previous work, PCA and LDA were both performed to discriminate between carboxylic acid vapors, volatile aldehydes, and plant VOCs. ,, The results showed that LDA can realize clearer discrimination than PCA. Other studies have also proven that the LDA model is more suitable for pattern information extraction in gas-sensing applications. ,, As shown in Figure b, two discrimination functions (LDA1 and LDA2) were used to cluster 54 samples into six distinct groups with no overlaps in the LDA score plot.…”

Section: Resultsmentioning

confidence: 99%

“…Due to the specific imprinted cavities, molecularly imprinting technology has been used in gas-sensing applications based on electrical, optical, and gravimetric techniques to achieve the highly selective adsorption of small target molecules. − Compared with conventional polymer-based MIPs, molecularly imprinted sol–gels (MISGs) have received significant attention because of their mild preparation conditions, high porosity, and stable chemical and thermal properties . In our previous work, MIPs have been deposited on quartz crystal microbalance or localized surface plasmon resonance gas sensor arrays as high selective materials to realize detection and discrimination of various gas vapors. − In addition, we have demonstrated that the chemiresistive sensors based on MISG active materials are promising for gas-sensing applications. , Although MIP or MISG materials have been integrated with various sensing platforms and have showed remarkable selectivity, the interesting MIP- or MISG-based sensors have been reported only at the academic level and are not yet fully exploited to form commercializing applications such as home pregnancy tests or self-used blood glucose meters . Part of the challenge of the complexity of commercializing MIP- or MISG-based sensors might lie in the lab-based fabrication technology.…”

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Fully Inkjet-Printed Chemiresistive Sensor Array Based on Molecularly Imprinted Sol–Gel Active Materials

Jiang

et al. 2022

ACS Sens.

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The fabrication of chemiresistive sensors by inkjet printing is recognized as a breakthrough in gas-sensing applications. One challenge of this technology, however, is how to enhance the cross-selectivity of the sensor array. Herein, we present a ketjen black (KB) ink and molecularly imprinted sol−gel (MISG) inks to support the fabrication of a fully inkjet-printed chemiresistive sensor array, enabling the highly accurate recognition of volatile organic acids (VOAs) on the molecular level. The MISG/KB sensor array was prepared on a glossy photographic paper with a three-layer structure: a circuit layer by a commercial silver ink, a conductive layer by a KB ink, and an active selective layer by MISG inks imprinted by different templates. Hexanoic acid (HA), heptanoic acid, and octanoic acid were used as templates to prepare the MISGs and as targets to evaluate the detection and discrimination performance of the sensor array. Three resultant MISG/KB sensors exhibited high sensitivity and selectivity to VOA vapors. The limit of detection and imprinting factor were 0.018 ppm and 7.82, respectively, for HA-MISG/KB sensors to the corresponding target. With linear discriminant analysis of the gas responses, the MISG/KB sensor array can realize high discrimination to VOAs in single and binary mixtures. Furthermore, the proposed sensor array showed strong sensor robustness with excellent consistency, durability, bending, and humidity resistance. This work developed a fully inkjet-printed chemiresistive sensor array, enabling the realization of high cross-selectivity detection, achieving low-cost, scalable, and highly reproducible sensor fabrication, moving it closer to reliable, commercial, and wearable multi-analyte human body odor analysis potential.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Fully Inkjet-Printed Chemiresistive Sensor Array Based on Molecularly Imprinted Sol–Gel Active Materials

Jiang

et al. 2022

ACS Sens.

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“…The target gas was generated using the bubbling method and then detected in the homemade gas detector cell. The gas concentrations were calculated by [ 40 ]:

where D r is the diffusion rate (ug/min), F is the flow rate of the dilute air (0.1 L/min) and k is the factor used to convert gas weight to volume, calculated by:

where M is the molecular weight, t is the temperature in the gas detector cell (20 °C) and P is the gas pressure (760 mmHg). The phenethyl alcohol, acetophenone and anethole concentrations of the target gas were calculated to be 403.4 ppm, 510.2 ppm and 623.7 ppm, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The target gas was generated using the bubbling method and then detected in the homemade gas detector cell. The gas concentrations were calculated by [40]:…”

Section: Gas Generation and Detection Systemmentioning

confidence: 99%

SERS Gas Sensors Based on Multiple Polymer Films with High Design Flexibility for Gas Recognition

Chen

Guo

Sassa

et al. 2021

Sensors

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The Surface-Enhanced Raman Scattering (SERS) technique is utilized to fabricate sensors for gas detection due to its rapid detection speed and high sensitivity. However, gases with similar molecular structures are difficult to directly discriminate using SERS gas sensors because there are characteristic peak overlaps in the Raman spectra. Here, we proposed a multiple SERS gas sensor matrix via a spin-coating functional polymer to enhance the gas recognition capability. Poly (acrylic acid) (PAA), Poly (methyl methacrylate) (PMMA) and Polydimethylsiloxane (PDMS) were employed to fabricate the polymer film. The high design flexibility of the two-layer film was realized by the layer-by-layer method with 2 one-layer films. The SERS gas sensor coated by different polymer films showed a distinct affinity to target gases. The principle component analysis (PCA) algorithm was used for the further clustering of gas molecules. Three target gases, phenethyl alcohol, acetophenone and anethole, were perfectly discriminated, as the characteristic variables in the response matrix constructed by the combination of gas responses obtained 3 one-layer and 3 two-layer film-coated sensors. This research provides a new SERS sensing approach for recognizing gases with similar molecular structures.

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The Effect of (3‐Mercaptopropyl)trimethoxysilane (MPS) Coating on the Genetic Detection Performance of Quartz Crystal Microbalance‐Dissipation (QCM‐D) Biosensor: Novel Intact Double‐Layered Surface Modification on QCM‐D

Soysaldı

Soylu

2021

ChemistrySelect

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Biosensor's ability depends on both platform performance and surface modification. In mass sensitive biosensors, a stable coating with molecular structural dynamism increases sensitivity. Also, its orientation and smoothness directly affect the performance of cross-linker molecules and receptors. In this study, the performance of intact double-layered (ID) coating used on QCMÀ D for the first time in DNA detection of MPS was investigated. The sensitivity of the QCMÀ D with ID-MPS was compared to the uncoated. At the concentrations of 10 10 and 10 13 copies/mL, the method with ID-MPS was approximately 6.4 times more sensitive. A shift of 1.22(� 0.42) Hz was observed at the detection limit at 10 8 copies/mL, while it was 0.19(� 0.05) Hz in the negative control. Thus, a signal-to-noise-ratio greater than 3, which is a measure of signal quality in biosensors, was exceeded with a ratio of 3.33, and it was shown that the detection signal at the sensitivity limit was sufficient. In addition, the two methods were compared visually with atomic force microscopy in terms of the amount and distribution of captured molecules, and it was determined that the ID-MPS was more efficient.

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Molecularly imprinted sol-gel/Au@Ag core-shell nano-urchin localized surface plasmon resonance sensor designed in reflection mode for detection of organic acid vapors

Cited by 20 publications

References 37 publications

Fully Inkjet-Printed Chemiresistive Sensor Array Based on Molecularly Imprinted Sol–Gel Active Materials

Fully Inkjet-Printed Chemiresistive Sensor Array Based on Molecularly Imprinted Sol–Gel Active Materials

SERS Gas Sensors Based on Multiple Polymer Films with High Design Flexibility for Gas Recognition

The Effect of (3‐Mercaptopropyl)trimethoxysilane (MPS) Coating on the Genetic Detection Performance of Quartz Crystal Microbalance‐Dissipation (QCM‐D) Biosensor: Novel Intact Double‐Layered Surface Modification on QCM‐D

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