In our study, we report Near-field electrospinning as a novel method of patterning and tuning suspended graphene channel. As a proof of concept, a resistive sensor has been fabricated for the detection of air carrying NH₃ gas vapors. The suspended graphene channel, performing as the primary sensing element, changes its resistivity when NH₃ molecules are absorbed on the surface of the graphene, effectively functioning as scattering centers. By utilizing the Near-field electrospinning for the deposition of the functional fibers, not only the width of the bridge but also the chemical doping effect on graphene can be readily tuned through the adjustment of process parameters and implementation of a wide range of polymers. About 78 % boost in sensitivity is confirmed when the width of suspended graphene channel is decreased from 15 μm to 5 μm. The presented process is expected to provide a simple, cost-effective and one-step precise manufacturing method by easily creating suspended graphene channels for a wide range of sensing applications not just limited to gas detection.

在我们的研究中，我们报告了近场静电纺丝作为构图和调整悬浮石墨烯通道的新方法。作为概念证明，已经制造了用于检测携带NH ₃气体蒸气的空气的电阻传感器。当NH ₃时，作为主要传感元件的悬浮石墨烯通道会改变其电阻率分子被吸收在石墨烯的表面上，有效地充当散射中心。通过利用近场静电纺丝沉积功能性纤维，不仅可以通过调节工艺参数和实施多种聚合物，轻松调节桥的宽度，而且可以轻松地调节对石墨烯的化学掺杂效果。当悬浮的石墨烯通道的宽度从15μm减小到5μm时，可以确认灵敏度提高了约78％。通过轻松地为各种传感应用创建悬浮的石墨烯通道，而不仅限于气体检测，所提出的方法有望提供一种简单，经济高效的一步式精确制造方法。