Development of optical sensors for the quantitative detection of ozone using gold and silver thin film nanoislands

Addanki, Satish; Jayachandiran, J.; Pandian, K.; Nedumaran, D.

doi:10.1016/j.snb.2014.12.071

Cited by 15 publications

(3 citation statements)

References 22 publications

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“…Moreover, APTMS introduces amino groups (−NH 2 ), which possess reactive properties and can undergo further reactions with the carboxyl groups (−COOH) present in SA molecules. As a result, amide bonds (−CONH−) are formed between APTMS and SA, facilitating the attachment of the hydrophobic SA coating onto the surface of the PVA film. − Overall, through hydrogen bonding between PVA and APTMS, together with chemical bonding between APTMS and SA, a dense network structure is formed, enhancing the hydrophobicity and water resistance of the PVA-based films. − More importantly, the hydrophobicity and water vapor permeability of the PVA film are of paramount importance in fruit packaging. Therefore, there is an urgent need to conduct research and develop a novel PVA film that possesses robust water resistance and exceptional barrier properties to expand the extensive utilization of PVA-based films in the field of food preservation.…”

Section: Introductionmentioning

confidence: 99%

How APTMS Acts as a Bridge to Enhance the Compatibility of the Interface between the Hydrophilic Poly(vinyl alcohol) Film and the Hydrophobic Stearic Acid Coating

Liu,

Xiao,

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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The hydrophobic modification of poly(vinyl alcohol) (PVA) film as a biodegradable packaging material has received significant attention in recent research. Despite the use of stearic acid (SA) as a coating for the PVA film, a challenge persists due to the poor compatibility between SA and PVA. This study addressed the aforementioned issue by utilizing (3-aminopropyl)trimethoxysilane (APTMS) as a bridging agent to establish a connection between the hydrophilic PVA film and the hydrophobic SA coating through hydrogen bonding and chemical reactions. First, SEM and EDS analyses confirmed the enhanced interfacial compatibility between the SA coating and the PVA film. Subsequently, the results from 1H NMR, FTIR, and XPS experiments presented evidence of hydrogen bonding and chemical reactions among APTMS, SA, and the PVA film. Interestingly, the PVA-APTMS-SA film demonstrated a contact angle of 120.77°, a water absorption of 7.81%, and a water vapor transmission rate of 8.69 g/m2/h. Furthermore, such a composite film displayed exceptional adhesion performance, requiring detachment stresses of 9.86 ± 0.91 and 6.17 ± 0.75 MPa when tested on glass and marble surfaces, respectively. In conclusion, the PVA-APTMS-SA film exhibited significant potential in extending the freshness of fresh-cut apples, making it a promising eco-friendly packaging material for food preservation.

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Section: Introductionmentioning

confidence: 99%

How APTMS Acts as a Bridge to Enhance the Compatibility of the Interface between the Hydrophilic Poly(vinyl alcohol) Film and the Hydrophobic Stearic Acid Coating

Liu,

Xiao,

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Therefore, it is vital to detect and monitor O3 concentration for the prevention of human health risks. Researchers have tried to detect ozone gas in the air by several methods such as optical ultraviolet absorption and electrochemical methods [5][6][7]. Metal oxide semiconductors (MOS) such as Co3O4 [8], ZnO/SnO2 [9], In2O3 [10], WO3 [11] and CuAlO2 [12] are the most investigated in this field.…”

Section: Introductionmentioning

confidence: 99%

Ozone sensing study of sprayed β-In2S3 thin films

Souissi

Bouguila

Bendahan

et al. 2022

Journal of Alloys and Compounds

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“…Hence, monitoring the process of O 3 penetration at various depths would be highly beneficial to understand and monitor the influence of O 3 on human skin wounds or ocular tissues. Although various techniques for the detection of O 3 have been developed, − the reports on direct visualization of the penetration and distribution of O 3 are rare. Transverse two-dimensional (2D) imaging of O 3 has been achieved by confocal laser scanning microscope (CLSM) and live-cell microscopy using fluorescent molecules as probes of O 3 . , These methods were capable of measuring O 3 in living cells but failed to offer real-time three-dimensional (3D) information on the penetration process of O 3 , due to the limited imaging depth and narrow imaging region.…”

mentioning

confidence: 99%

Gold Nanoprobe-Enabled Three-Dimensional Ozone Imaging by Optical Coherence Tomography

et al. 2017

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Ozone (O) would be harmful to human skin for its strong oxidizing property, especially when stratum corneum or corneal epithelium is wounded. Imaging the penetration and distribution of ozone at depth is beneficial for studying the influence of ozone on skin or eyes. Here, we introduced a facile method for three-dimensional (3D) imaging of the penetration of O into the anterior chamber of an isolated crucian carp eye by using optical coherence tomography (OCT) combined with gold triangular nanoprisms (GTNPs) as the contrast agent and molecular probe. We illustrated the specific response of GTNPs to ozone and demonstrated that GTNPs can function as an efficient nanoprobe for sensing O. The stabilities of GTNPs in different biologic solutions, as well as the signal intensity of GTNPs on an OCT imaging system, were investigated. Visualization of 3D penetration and distribution of O in the biologic tissue was proved for the first time. The quantitative analysis of O diffusion in the anterior chamber of the fish eye revealed a penetration depth of 311 μm within 172 min. Due to the strong scattering, near-infrared extinction band, and easy functionalization of GTNPs, they could further serve as nanoprobes for 3D OCT or multimodal imaging of other molecules or ions in the future.

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Development of optical sensors for the quantitative detection of ozone using gold and silver thin film nanoislands

Cited by 15 publications

References 22 publications

How APTMS Acts as a Bridge to Enhance the Compatibility of the Interface between the Hydrophilic Poly(vinyl alcohol) Film and the Hydrophobic Stearic Acid Coating

How APTMS Acts as a Bridge to Enhance the Compatibility of the Interface between the Hydrophilic Poly(vinyl alcohol) Film and the Hydrophobic Stearic Acid Coating

Ozone sensing study of sprayed β-In2S3 thin films

Gold Nanoprobe-Enabled Three-Dimensional Ozone Imaging by Optical Coherence Tomography

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