| 초록 |
A PMMA (polymethylmethacrylate) nanofiber was prepared by electrospinning and attached to the two prongs of a quartz tuning fork (QTF) to form a polymer bridge. The average wire diameter is 462 nm ± 65 nm, which is much thinner than that of the polymer wire produced by the tip-drawing method (~15 μm). The attachment of the wire increased the resonance frequency due to an increase in the stiffness of the QTF. The resonance frequency of the PMMA fiber-coated QTF decreased upon exposure to water vapor, which was attributed to a decrease in the modulus of the wire induced by the adsorption of moisture. The sensitivity of the PMMA wire-coated QTF was enhanced by increasing the number of PMMA wires on the QTF without affecting the response time of the sensor. Controlled alignment and patterning of thinner polymer wires on the QTF could be achieved by optimizing the electrospinning conditions and by utilizing an electrohydrodynamic nanowire printer. |
