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Chemosensors · 2024 ·Vol. 12 ·期 6 ·101 · IF 3.7

Thermal Modulation of Resistance Gas Sensor Facilitates Recognition of Fragrance Odors

Ran Sui,Erpan Zhang,Xiaoshui Tang,Wenjun Yan,Yun Liu,Houpan Zhou

Herein, we prepared two different MOS-based gas sensors with integrated micro-hotplates. The two sensors were employed to detect various fragrances (cedar, mandarin orange, rose A, and rose B), exhibiting similarly great sensing performances. The gas sensing properties of the MOS-based sensor depend on the sensor’s operating temperature. In addition to isothermal operation, various pulse heating modes were applied to investigate the gas sensing performances with respect to the four fragrances. Multivariate gas sensing features of the four fragrances were obtained under different operating modes, which were utilized for the recognition of fragrance odors successfully, based on the long short-term memory (LSTM) algorithm.

CAS / MDL: 13820-53-6 8000-41-7

研究领域: 材料科学 · 电子工程 · 人工智能

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TALANTA · 2025 · IF 6.1

Bionic helical sensor array inspired by mammal olfactory recess

Zhiyuan Wu,Fengchun Tian,Yuzhu Nie,Yue Liu,Hantao Li

The performance of sensor arrays in electronic noses (E-noses) is influenced by their spatial distribution. Inspired by the mammalian olfactory recess, this paper presents a flexible sensor array with a bionic helical structure. By integrating Metal-Organic Framework (MOF) materials and thermal modulation, the array's sensor units exhibit differentiated odor selectivity. Computational fluid dynamics (CFD) simulations show that the bionic structure mimics the rectification effect of the olfactory recess, ensuring more uniform odor concentration distribution. For 14 odorants, the helical array outperformed the planar design across all key metrics (accuracy, sensitivity, specificity, AUC, and F1 score) with a peak classification accuracy of 85.8 ± 4.7 % versus 79.7 ± 6.5 %. This bio-inspired approach offers potential for enhancing electronic nose performance and achieving high-precision odor recognition.

CAS / MDL: 6046-93-1

研究领域: 传感器 · 仿生工程 · 嗅觉技术 · 分析化学 · 人工智能

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Nature Communications · 2022 ·Vol. 13 ·期 1 ·1-13 · IF 17.694

Chiral nanocrystals grown from MoS2 nanosheets enable photothermally modulated enantioselective release of antimicrobial drugs

Li Bang Lin,Luo Jun Jiang,Zou Hao Lin,Zhang Qing-Meng,Zhao Liu-Bin,Qian Hang,Luo Hong Qun,Leong David Tai,Li Nian Bing

The transfer of the concept of chirality from molecules to synthesized nanomaterials has attracted attention amongst multidisciplinary teams. Here we demonstrate heterogeneous nucleation and anisotropic accumulation of Au nanoparticles on multilayer MoS 2 planes to form chiroptically functional nanomaterials. Thiol amino acids with chiral conformations modulate asymmetric growth of gold nanoarchitectures on seeds of highly faceted Au/MoS 2 heterostructures. Consequently, dendritic plasmonic nanocrystals with partial chiral morphologies are synthesized. The chirality of dendritic nanocrystals inherited from cysteine molecules refers to the structural characteristics and includes specific recognition of enantiomeric molecules. With integration of the intrinsic photothermal properties and inherited enantioselective characteristics, dendritic Au/MoS 2 heterostructures exhibit chirality-dependent release of antimicrobial drugs from hydrogel substrates when activated by exogenous infrared irradiation. A three-in-one strategy involving synthesis of chiral dendritic heterostructures, enantioselective recognition, and controlled drug release system is presented, which improves nanomaterial synthetic technology and enhances our understanding of crucial chirality information.

CAS / MDL: 82419-36-1

研究领域: 纳米技术 · 材料科学 · 生物医学工程 · 药学

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Thermal Modulation of Resistance Gas Sensor Facilitates Recognition of Fragrance Odors

Bionic helical sensor array inspired by mammal olfactory recess

Chiral nanocrystals grown from MoS2 nanosheets enable photothermally modulated enantioselective release of antimicrobial drugs