Journal ArticleDOI
Optimization of Au:CuO Nanocomposite Thin Films for Gas Sensing with High-Resolution Localized Surface Plasmon Resonance Spectroscopy.
Reads0
Chats0
TLDR
The results showed that the Au:CuO thin film system is a RI sensitive platform able to detect inert gases, which can be more sensitive to detect non-inert gases as O2 or even other reactive species.Abstract:
Gas sensing based on bulk refractive index (RI) changes, has been a challenging task for localized surface plasmon resonance (LSPR) spectroscopy, presenting only a limited number of reports in this field. In this work, it is demonstrated that a plasmonic thin film composed of Au nanoparticles embedded in a CuO matrix can be used to detect small changes (as low as 6 × 10-5 RIU) in bulk RI of gases at room temperature, using a high-resolution LSPR spectroscopy system. To optimize the film's surface, a simple Ar plasma treatment revealed to be enough to remove the top layers of the film and to partially expose the embedded nanoparticles, and thus enhance the film's gas sensing capabilities. The treated sample exhibits high sensitivity to inert gases (Ar, N2), presenting a refractive index sensitivity (RIS) to bulk RI changes of 425 nm/RIU. Furthermore, a 2-fold signal increase is observed for O2, showing that the film is clearly more sensitive to this gas due to its oxidizing nature. The results showed that the Au:CuO thin film system is a RI sensitive platform able to detect inert gases, which can be more sensitive to detect noninert gases as O2 or even other reactive species.read more
Citations
More filters
Journal ArticleDOI
Flexible Plasmonic Biosensors for Healthcare Monitoring: Progress and Prospects.
TL;DR: In this paper, a review of the recent advance of flexible plasmonic biosensors for the healthcare sector is presented, which broadly covers the design and selection of a flexible substrate, the process to integrate flexible and PLASmonic units, the exploration of different types of flexible PLAsmonic sensors to monitor human temperature, blood glucose, ions, gas, and motion indicators, as well as their applications for surface-enhanced Raman scattering (SERS) and colorimetric detections.
Journal ArticleDOI
Optical characterizations of PMMA/metal oxide nanoparticles thin films: bandgap engineering using a novel derived model.
TL;DR: In this paper, the authors synthesize and optically characterize pure PMMA and PMMA incorporated with metal oxides nanoparticles (MO NPs) such as ZnO, CuO, TiO2 and SiO2 NPs nanocomposite thin films with weight concentration of 10% using dip-coating technique.
Journal ArticleDOI
Gas Sensors Based on Localized Surface Plasmon Resonances: Synthesis of Oxide Films with Embedded Metal Nanoparticles, Theory and Simulation, and Sensitivity Enhancement Strategies
Marcos Rodrigues,Joel Nuno Pinto Borges,C. Lopes,Rui M. S. Pereira,Mikhail Vasilevskiy,Filipe Vaz +5 more
TL;DR: In this article, the Portuguese Foundation for Science and Technology (FCT) funded the research of Marco S. Rodrigues and his colleagues in the context of the Strategic Funding UIDB/04650/2020.
Journal ArticleDOI
Nanoparticles in analytical laser and plasma spectroscopy – a review of recent developments in methodology and applications
TL;DR: In this article, the progress in the field of nanoparticle-related analytical laser and plasma spectroscopy research, focusing on the results of the past decade, is comprehensively summarized.
Journal ArticleDOI
The effects of operating parameters on the morphology, and the SERS of Cu NPs prepared by spark discharge deposition
TL;DR: In this article, a glass substrate was fabricated by spark discharge of copper electrode under different atmospheric conditions for SERS application and the average diameter of the as-deposited Cu rods was measured by the TEM to be 39nm.
References
More filters
Journal ArticleDOI
Biosensing with plasmonic nanosensors
TL;DR: This paper introduces the localized surface plasmon resonance (LSPR) sensor and describes how its exquisite sensitivity to size, shape and environment can be harnessed to detect molecular binding events and changes in molecular conformation.
Journal ArticleDOI
Localized Surface Plasmon Resonance Sensors
Kathryn M. Mayer,Jason H. Hafner +1 more
Journal ArticleDOI
Surface plasmon resonance for gas detection and biosensing
TL;DR: The surface plasmon resonance (SPR) is a new optical technique in the field of chemical sensing as discussed by the authors, which can be used for gas detection, together with results from exploratory experiments with relevance to biosensing.
Journal ArticleDOI
Metal oxide gas sensors: Sensitivity and influencing factors
TL;DR: A brief review of changes of sensitivity of conductometric semiconducting metal oxide gas sensors due to the five factors: chemical components, surface-modification and microstructures of sensing layers, temperature and humidity.
Journal ArticleDOI
Review of Some Interesting Surface Plasmon Resonance-enhanced Properties of Noble Metal Nanoparticles and Their Applications to Biosystems
TL;DR: In this article, a review of the plasmon resonance (SPR) enhanced optical properties of noble metal nanoparticles is presented, with an emphasis on the recent advances in the utility of these plasmoric properties in molecular-specific imaging and sensing, photo-diagnostics, and selective photothermal therapy.