Trace Detection of Nitrogen Dioxide via Porous Tin Dioxide Nanopods with High Specific Surface Area and Enhanced Charge Transfer DOI

Xiuwei Li,

Yuyang Wang, Xue Liu

и другие.

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Май 26, 2025

Nitrogen oxides, particularly nitrogen dioxide (NO2), contribute significantly to environmental pollution and pose serious risks public health. Therefore, detecting even low concentrations of NO2 is significant for effective monitoring health protection. Existing gas sensors, however, have limitations such as sensitivity, insufficient selectivity, slow response recovery times. In this work, we synthesized tin-based metal-organic framework nanorods using phthalic acid the ligand subsequently fabricated porous tin (SnO2) nanopods through high-temperature calcination. The resulting SnO2 feature one-dimensional rod-like frameworks filled with plenty nanoparticles. This micronanostructure exhibits a large specific surface area (299.8 m2/g) pore size (30.8 nm), which facilitates adsorption, diffusion, reactions NO2. sensors demonstrate excellent performance in NO2, value 64 1 part per million (ppm) at working temperature 250 °C, time 15 s, 20 s. Moreover, nanopod show wide detection range from 10 parts billion 100 ppm, good repeatability, long-term stability, reliable under high humidity conditions (90% relative humidity).

Язык: Английский

Nanoscale Materials in Biomedical Applications of Sensors: Insights from a Comprehensive Landscape Analysis DOI Creative Commons
Kavita A. Iyer, Rumiana Koynova,

Krittika Ralhan

и другие.

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 10, 2025

Since their inception in the early 1960s, use of nanoscale materials has progressed leaps and bounds, role diverse fields ranging from human health to energy is undeniable. Nanosensors are devices having dimensions designed detect, record, transmit signals provide valuable data information. In this review, we utilize CAS Content Collection, a vast repository scientific information extracted journals patent publications, identify emerging applications field. This involves understanding trends, such as growth certain topics over time, well establishing relationships between topics. Our analysis indicates that among various nanomorphologies explored nanosensors, nanoparticles, nanotubes, quantum dots tend lead. terms types chemical biological sensors account for nearly 80% publications. combination with bibliographic data, utilized our access Registry identified host across substance classes (polymers, small molecules, elements) associated nanosensor Finally, major application nanosensors appears be biomedical nature (cancer diagnosis/testing drug discovery, example). findings highlighted TrendScape map provides an overview research interest concepts We also snapshot commercial development briefly discuss currently under development. It hope review comprehensive field serves guide researchers/scientists.

Язык: Английский

Процитировано

1
Gate Voltage Regulation of Surface Properties in Polyethylenimine-Doped Indium Oxide Transistors for Enhanced Detection of Low-Concentration NO2 at Room Temperature DOI
Chengyao Liang, Fuguo Wang,

Jiongyue Hao

и другие.

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 5236 - 5243

Опубликована: Май 18, 2025

Nitrogen dioxide (NO2), a toxic environmental pollutant, requires high-performance sensors for ppb-level detection. While indium oxide thin-film transistors (In2O3 TFTs) show promise, conventional devices require costly vacuum equipment, unlike solution-processed spin-coating, which is suitable scalable fabrication. Channel doping enhances gas sensing performance but degrades transistor output current. This work introduces polyethylenimine (PEI) as the electron dopant In2O3 TFTs. PEI provides abundant electrons NO2 interaction, limited current-driving capability of resistive fundamentally restricts their detection sensitivity to such low-amplitude signals. Gate voltage-regulated surface electronic states in thin films significantly enhance capability, enabling ultrasensitive down subppb concentrations. The 1% PEI-doped TFT demonstrates saturation drain current 0.065 mA, representing 1.91-fold enhancement over undoped counterpart (0.034 mA). Furthermore, optimized PEI: achieves 23% response toward 10 ppb NO2.

Язык: Английский

Процитировано

0
Trace Detection of Nitrogen Dioxide via Porous Tin Dioxide Nanopods with High Specific Surface Area and Enhanced Charge Transfer DOI

Xiuwei Li,

Yuyang Wang, Xue Liu

и другие.

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Май 26, 2025

Nitrogen oxides, particularly nitrogen dioxide (NO2), contribute significantly to environmental pollution and pose serious risks public health. Therefore, detecting even low concentrations of NO2 is significant for effective monitoring health protection. Existing gas sensors, however, have limitations such as sensitivity, insufficient selectivity, slow response recovery times. In this work, we synthesized tin-based metal-organic framework nanorods using phthalic acid the ligand subsequently fabricated porous tin (SnO2) nanopods through high-temperature calcination. The resulting SnO2 feature one-dimensional rod-like frameworks filled with plenty nanoparticles. This micronanostructure exhibits a large specific surface area (299.8 m2/g) pore size (30.8 nm), which facilitates adsorption, diffusion, reactions NO2. sensors demonstrate excellent performance in NO2, value 64 1 part per million (ppm) at working temperature 250 °C, time 15 s, 20 s. Moreover, nanopod show wide detection range from 10 parts billion 100 ppm, good repeatability, long-term stability, reliable under high humidity conditions (90% relative humidity).

Язык: Английский

Процитировано

0