Short-channel electronic devices several micrometers in length are difficult to implement by direct inkjet printing due to the limitation of position accuracy of the common inkjet printer system and the spread of functional ink on substrates. In this report, metal oxide thin-film transistors (TFTs) with channel lengths of 3.5 ± 0.7 μm were successfully fabricated with a common inkjet printer without any photolithography steps. Hydrophobic CYTOP coffee stripes, made by inkjet-printing and plasma-treating processes, were utilized to define the channel area of TFTs with channel lengths as short as ∼3.5 μm by dewetting the inks of the source/drain (S/D) precursors. Furthermore, by introduction of an ultrathin layer of PVA to modify the S/D surfaces, the spreading of precursor ink of the InOx semiconductor layer was well-controlled. The inkjet-printed short-channel TFTs exhibited a maximum mobility of 4.9 cm2 V–1 s–1 and an on/off ratio of larger than 109. This approach of fabricating short-channel TFTs by inkjet printing will promote the large-area fabrication of short-channel TFTs in a cost-effective manner.
Antibiotic resistance and the high infectivity of bacteria pose an increasingly threat to human health. Mesoporous silica supporting metal-based nanoparticles are considered an effective strategy to fight bacterial infections. In this work, the short channeled mesoporous Zr-SBA-15 (SBA-S) material is synthesized by sol-gel method using ZrOCl 2 ·8H 2 O as an additive. Nanoparticles based on four types of copper species, Cu, Cu 2 O, CuO, and CuSO 4 , are successfully prepared, forming the Cu-loaded SBA-S materials. The composite structures are comprehensively characterized by SEM, TEM, XRD , XPS , UV–Vis DRS, FTIR, ICP , TG, and BET analysis. It turns out that all structures maintain the arrays of highly ordered pore channels, high specific surface area (SSA, ≥500 m 2 g −1 ), and narrow width of pore size (∼7 nm). The release of Cu 2+ ions shows the order is CuSO 4 /SBA-S > CuO/SBA-S > Cu 2 O/SBA-S > Cu/SBA-S. Antibacterial activity assay indicates that CuO/SBA-S shows 1.25 and 0.62 mg mL −1 of the minimum bactericidal concentration (MBC) values against E. coli and S. aureus . The acting mechanism would include the free Cu 2+ ions and the nanoparticle-induced reactive oxygen species (ROS). We propose that the cheap CuO/SBA-S material would be a promising antibacterial agent with the good antibacterial activity.
危险品化学品经营许可证（带存储）