Spectroscopic evidence of the radioresistance of Chroococcidiopsis biosignatures: A combined Raman, FT-IR and THz-TDs spectroscopy study DOI Creative Commons
Elisa Fardelli, Annalisa D’Arco, S. Lupi

et al.

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Journal Year: 2022, Volume and Issue: 288, P. 122148 - 122148

Published: Nov. 24, 2022

In the last decades, Mars has been widely studied with on-site missions and observations, showing a planet that could have hosted life in past. For this reason, recent future space on red will search for traces of past and, possibly, present life. As basis these missions, Space Agencies, such as European Agency, conducted many experiments living organisms, studying their behavior extraterrestrial conditions, learning to recognize biosignatures techniques remotely controllable Raman spectroscopy. Among radioresistant cyanobacterium Chroococcidiopsis was irradiated during STARLIFE campaign strong radiative insults. article we investigated using spectroscopy extended characterization its response stress mid- Infrared Terahertz spectral region Fourier Transform InfraRed (FT-IR) Time Domain (THz- TDs), which demonstrates compatibility suitability missions.

Language: Английский

P-Type Metal Oxide Semiconductor Thin Films: Synthesis and Chemical Sensor Applications DOI Creative Commons
Abderrahim Moumen, Gayan W. C. Kumarage, Elisabetta Comini

et al.

Sensors, Journal Year: 2022, Volume and Issue: 22(4), P. 1359 - 1359

Published: Feb. 10, 2022

This review focuses on the synthesis of p-type metal-oxide (p-type MOX) semiconductor thin films, such as CuO, NiO, Co3O4, and Cr2O3, used for chemical-sensing applications. P-type MOX films exhibit several advantages over n-type MOX, including a higher catalytic effect, low humidity dependence, improved recovery speed. However, sensing performance Cr2O3 is strongly related to intrinsic physicochemical properties material thickness these films. The latter heavily dependent techniques. Many techniques growing p-MOX are reviewed herein. Physical vapor-deposition (PVD), magnetron sputtering, thermal evaporation, oxidation, molecular-beam epitaxial (MBE) growth were investigated, along with chemical vapor deposition (CVD). Liquid-phase routes, sol–gel-assisted dip-and-spin coating, spray pyrolysis, electrodeposition, also discussed. A each technique, well factors that affect morphology, crystallinity, defects, grain size, presented. mechanism describing surface reaction gases characteristics their response, sensor kinetics, stability, selectivity, repeatability reviewed. Different compounds, reducing (such volatile organic compounds (VOCs), H2, NH3) oxidizing gases, CO2, NO2, O3, analyzed. Bulk doping, decoration, heterostructures some strategies improving capabilities suggested pristine Future trends overcome challenges thin-film sensors

Language: Английский

Citations

112
Artificial intelligence enhanced sensors - enabling technologies to next-generation healthcare and biomedical platform DOI Creative Commons
Chan Wang, Tianyiyi He, Hong Zhou

et al.

Bioelectronic Medicine, Journal Year: 2023, Volume and Issue: 9(1)

Published: Aug. 2, 2023

The fourth industrial revolution has led to the development and application of health monitoring sensors that are characterized by digitalization intelligence. These have extensive applications in medical care, personal management, elderly sports, other fields, providing people with more convenient real-time services. However, these face limitations such as noise drift, difficulty extracting useful information from large amounts data, lack feedback or control signals. artificial intelligence provided powerful tools algorithms for data processing analysis, enabling intelligent monitoring, achieving high-precision predictions decisions. By integrating Internet Things, intelligence, sensors, it becomes possible realize a closed-loop system functions collection, online diagnosis, treatment recommendations. This review focuses on healthcare enhanced technologies aspects materials, device structure, integration, scenarios. Specifically, this first introduces great advances wearable respiration rate, heart pulse, sweat, tears; implantable cardiovascular nerve signal acquisition, neurotransmitter monitoring; soft electronics precise therapy. Then, recent volatile organic compound detection highlighted. Next, current developments human-machine interfaces, AI-enhanced multimode self-sustainable systems reviewed. Last, perspective future directions further research is also provided. In summary, fusion will provide intelligent, convenient, secure services next-generation biomedical applications.

Language: Английский

Citations

98
Terahertz Spectroscopic Analysis in Protein Dynamics: Current Status DOI Creative Commons
Tiziana Mancini, Rosanna Mosetti, A. Marcelli

et al.

Radiation, Journal Year: 2022, Volume and Issue: 2(1), P. 100 - 123

Published: Feb. 7, 2022

Proteins play a key role in living organisms. The study of proteins and their dynamics provides information about functionality, catalysis potential alterations towards pathological diseases. Several techniques are used for studying protein dynamics, e.g., magnetic resonance, fluorescence imaging techniques, mid-infrared spectroscopy biochemical assays. Spectroscopic analysis, based on the use terahertz (THz) radiation with frequencies between 0.1 15 THz (3–500 cm−1), was underestimated by community. In recent years, however, analysis both simple structures, such as polypeptide molecules, complex complexes, has been demonstrated. absorption spectrum some proteins: small molecules is dominated individual modes related to presence hydrogen bonds. For peptides, spectral concerns secondary structure, while globular viral glycoproteins, spectra also provide collective modes. this short review, we discuss results obtained investigations. particular, will illustrate advantages applications spectroscopy, pointing out complementary it may provide.

Language: Английский

Citations

42
Qualitative and Quantitative Recognition of Volatile Organic Compounds in Their Liquid Phase Based on Terahertz Microfluidic EIT Meta-Sensors DOI

Wenfeng Fu,

Li Sun,

Hongyan Cao

et al.

IEEE Sensors Journal, Journal Year: 2023, Volume and Issue: 23(12), P. 12775 - 12784

Published: April 21, 2023

Volatile organic compounds (VOCs) are directly associated with human health concerns and environmental safety. Therefore, it is urgent to achieve accurate detection of VOCs both qualitatively quantitatively. In this work, the qualitative ethyl benzene (EB), isopropyl alcohol (IPA), acetate (EA)—three pure in liquid phase—was discussed using terahertz (THz) microfluidic electromagnetic-induced transparency (EIT) meta-sensors. The THz response illustrated that an increase VOCs' volumes (1– $6~\mu \text{L}$ ), resonant frequencies dual transmission dips (0.855 1.724 THz) EIT peak (1.213 exhibited redshift. limit detections (LODs) for IPA, EA, EB can 5.45, 13.46, notation="LaTeX">$4.35~\mu \text{g}$ , respectively. multivariate fusion (MF) model based on responses was utilized improve accuracy trace classification VOCs. Furthermore, above method combined principal component analysis Gaussian mixture (PCA-GMM) neural network algorithm support vector machine (SVM) applied recognition addition, not feasible detect amounts (typically 0.3 mg/L) wastewater because water highly absorbable band will evaporate if removed. Here, soil were detected classified by PCA-GMM MF. Our results provide a new meta-sensor platform phase may be used identify hazardous wastes illegal dumping.

Language: Английский

Citations

41
Sensing and Nondestructive Testing Applications of Terahertz Spectroscopy and Imaging Systems: State-of-the-Art and State-of-the-Practice DOI
Walter Nsengiyumva, Shuncong Zhong, Longhui Zheng

et al.

IEEE Transactions on Instrumentation and Measurement, Journal Year: 2023, Volume and Issue: 72, P. 1 - 83

Published: Jan. 1, 2023

Terahertz (THz) technology has firmly established itself as an effective sensing and nondestructive testing technique for the detection of substances physico-chemical evaluation materials structural systems since its first emergence almost three decades ago. To date, both effectiveness accuracy this have been extensively demonstrated in a myriad applications across spectrum research development all way to process analytical technology, quality control, testing, health monitoring. These are generally enabled by production availability advanced, versatile, robust, highly accurate, industrially rugged THz spectroscopy imaging systems, unique properties waves compared with other electromagnetic waves, well advancements electronics, photonics, metamaterial development. This article presents comprehensive state-of-the-art state-of-the-practice review analyzes role metamaterials enhancing resolution sensitivity systems. The study also provides general overview fundamentals discusses suitability variety real-world application scenarios ( e.g . composites' defect evaluation, paints coatings thickness measurement characterization, biomolecule detection, xmlns:xlink="http://www.w3.org/1999/xlink">etc .). Aspects such noise caused presence barriers, challenges experimental implementations operability long times required acquire images, limited customizability portability currently available discussed.

Language: Английский

Citations

28
Improvement in the performance of In2O3 ethanol sensor by perovskite-type LaFeO3 modification and sensitivity mechanism analysis DOI
Zhenyu Yuan,

Ninghao Chu,

Fanli Meng

et al.

Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 406, P. 135415 - 135415

Published: Jan. 30, 2024

Language: Английский

Citations

14
Bio-waste derived reduced graphene oxide (rGO) decorated Cr (III) doped α-Fe2O3 nanocomposite for selective ppm-level acetone sensing at room temperature: Potential approach towards non-invasive diagnosis of diabetic biomarker DOI Creative Commons

Sovandeb Sen,

Susmita Kundu

Advanced Composites and Hybrid Materials, Journal Year: 2025, Volume and Issue: 8(1)

Published: Jan. 24, 2025

Language: Английский

Citations

1
Volatile organic compounds (VOCs) detection for the identification of bacterial infections in clinical wound samples DOI Creative Commons
Mostafa Azimzadeh, Patricia Khashayar, Marziyeh Mousazadeh

et al.

Talanta, Journal Year: 2025, Volume and Issue: 292, P. 127991 - 127991

Published: March 20, 2025

Language: Английский

Citations

1
Fluorescence-Based Portable Assays for Detection of Biological and Chemical Analytes DOI Creative Commons
Peuli Nath,

Kazi Ridita Mahtaba,

Aniruddha Ray

et al.

Sensors, Journal Year: 2023, Volume and Issue: 23(11), P. 5053 - 5053

Published: May 25, 2023

Fluorescence-based detection techniques are part of an ever-expanding field and widely used in biomedical environmental research as a biosensing tool. These have high sensitivity, selectivity, short response time, making them valuable tool for developing bio-chemical assays. The endpoint these assays is defined by changes fluorescence signal, terms its intensity, lifetime, and/or shift spectrum, which monitored using readout devices such microscopes, fluorometers, cytometers. However, often bulky, expensive, require supervision to operate, makes inaccessible resource-limited settings. To address issues, significant effort has been directed towards integrating fluorescence-based into miniature platforms based on papers, hydrogels, microfluidic devices, couple with portable like smartphones wearable optical sensors, thereby enabling point-of-care analytes. This review highlights some the recently developed discussing design fluorescent sensor molecules, their sensing strategy, fabrication devices.

Language: Английский

Citations

22
Efficient THz generation through laser and plasma parameter optimization with Sinh-Gaussian beams in magnetized plasma DOI
Jasveer Singh, Sunita Rani,

Hitesh Kumar Midha

et al.

Journal of Optics, Journal Year: 2024, Volume and Issue: unknown

Published: July 11, 2024

Language: Английский

Citations

7