Here, a high sensitivity gas sensing ink based on sulfonated rGO (S-rGO) decorated with SnS 2 is synthesized for room temperature NO 2 and NH 3 detection. This sensing ink demonstrated an excellent sensitivity to ppb-level NO 2 (17% response to 125 ppb) and sub-ppm-level NH 3 (11% response to 1 ppm). The unique absorption properties of SnS 2 improve the sensitivity of S-rGO 4.2 and 55 times to NO 2 and NH 3 , respectively. Besides, the superhydrophobicity of the SnS 2 endows the sensor with exceptional immunity to high relative humidity (RH). Furthermore, the sensors exhibit negligible degradation to NO 2 and less than 15% degradation to NH 3 in a wide range of RH from 30 (ambient humidity) to 90%. More importantly, the obtained full-written ink can be applied to common substrates, such as glass, clothes, and paper, and maintain excellent performance after being bent and twisted by 180°.
Mild traumatic brain injury (mTBI) is characterized by structural disconnection and large-scale neural network dysfunction in the resting state. However, little is known concerning the intrinsic changes in local spontaneous brain activity in patients with mTBI. The aim of the current study was to assess regional synchronization in acute mTBI patients. Fifteen acute mTBI patients and 15 sex-, age-, and education-matched healthy controls (HCs) were studied. We used the regional homogeneity (ReHo) method to map local connectivity across the whole brain and performed a two-sample t-test between the two groups. Compared with HCs, patients with acute mTBI showed significantly decreased ReHo in the left insula, left precentral/postcentral gyrus, and left supramarginal gyrus (p < 0.05, AlphaSim corrected). The ReHo index of the left insula showed a positive correlation with the Mini-Mental State Examination (MMSE) scores across all acute mTBI patients (p < 0.05, uncorrected). The ReHo method may provide an objective biomarker for evaluating the functional abnormity of mTBI in the acute setting.
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