Advances in volatile organic compounds detection: From fundamental research to real-world applications

Applied Physics Reviews, Год журнала: 2024, Номер 11(4)

Опубликована: Ноя. 12, 2024

Volatile organic compounds (VOCs) play a crucial role in affecting health, environmental integrity, and industrial operations, from air quality to medical diagnostics. The need for highly sensitive selective detection of these has spurred innovation sensor technologies. This editorial introduces special collection articles Applied Physics Reviews, exploring the latest advancements VOC featured works cover range innovations, including electrostatically formed nanowires, chiral liquid crystals, graphene-based sensors enhanced by machine learning. Together, highlight dynamic progress detection, striving improved sensitivity, selectivity, real-world applicability. not only showcases pioneering research but also provides valuable insights into future trends potential applications field.

Язык: Английский

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Acousto-Optic Modulation on Silicon-Aluminum Nitride Hybrid-Integrated Platform for Cryogenic Applications

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Silicon platforms are widely recognized as an industry standard for photonic integrated circuits. However, conventional tuning mechanisms, such thermo-optic and plasma dispersion effects, impose limitations in advanced applications, quantum computing, where low-loss cryogenic operation critical. Acousto-optic (AO) modulation offers a promising alternative, broadening the scope of silicon photonics. Here, we investigate aluminum nitride (AlN)-silicon hybrid platform to enable AO on waveguides. The interaction is enhanced through Fabry–Perot resonant cavity, achieving π-phase shift voltage (Vπ) 27.8 V half-wave voltage-length product (VπL) 0.55 V·cm with length 200 μm. We also demonstrate under conditions, device performance metrics improve 16.5 0.33 V·cm, respectively. Fabricated using complementary metal-oxide-semiconductor-compatible processes, this AlN-silicon seamless integration electronic components, underscoring its potential next-generation systems.

Язык: Английский

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Breath analysis using FTIR spectroscopy

Exploration of Medicine, Год журнала: 2025, Номер unknown

Опубликована: Апрель 17, 2025

Breath analysis is a relatively new topic of study that has lot potential for both therapeutic and scientific applications. The volatile organic compounds (VOCs) found in breath are created internally by the body due to environmental interactions, gut air passage bacteria, metabolites ingested precursors. may help diagnose disorders linked changes composition, according several recent research. An analytical technique shows promise metabolic examination infrared spectroscopy. Chemical substances exhaled human can be used illnesses, determine physiological states, or evaluate exposure. Exhaled (EB) perfect biological fluid because it nearly limitless causes little no discomfort patient, which promotes collaboration. Furthermore, EB sampled without requiring medical professionals privacy, usually doesn’t produce infectious waste (despite airborne infections), makes desirable method variety non-invasive solely uses composition characterize bloodstream airways’ content, indicates state condition entire body’s metabolism. absorption strength still very modest, though, contains minimal amounts them. Several most spectroscopy analysis, published between 2020 2024, presented this study.

Язык: Английский

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Denoising-autoencoder-facilitated MEMS computational spectrometer with enhanced resolution on a silicon photonic chip

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Ноя. 26, 2024

Abstract Silicon photonics enables the construction of chip-scale spectrometers, in which those using a single tunable interferometer provide simple and cost-effective solution. Among various tuning mechanisms, electrostatic MEMS reconfiguration stands out as an ideal candidate, given its high efficiency ultra-low power consumption. Nonetheless, devices face significant noise challenges arising from their susceptible minuscule components, adversely impacting spectral resolution. Here, we propose distinct paradigm spectrometers through synergizing easily-fabricated MEMS-reconfigurable low-loss waveguide coupler on silicon photonic chip convolutional autoencoder denoising (CAED) mechanism. The spectrometer offers 300 nm bandwidth reconstruction resolution 0.3 noise-free condition. In noisy environment with signal-to-noise ratio low 30 dB, interferograms processed by CAED exhibits enhancement 1.2 to 0.4 nm, approaching value. Our technology is envisaged powerful solution for applications requiring accurate, broadband, energy-efficient analysis.

Язык: Английский

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Green synthesis of multifunctional nanocrystalline quarternary vanadates for room temperature chemiresistive sensing of isopropyl alcohol

Inorganic Chemistry Communications, Год журнала: 2024, Номер unknown, С. 113785 - 113785

Опубликована: Дек. 1, 2024

Язык: Английский

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