Details

Autor(en) / Beteiligte

• Hu, Yu-Lin
• Hua, Yu
• Pan, Zhong-Qin
• Qian, Jia-Han
• Yu, Xiao-Yang
• Bao, Ning
• Huo, Xiao-Lei
• Wu, Zeng-Qiang
• Xia, Xing-Hua

Titel

PNP Nanofluidic Transistor with Actively Tunable Current Response and Ionic Signal Amplification

Ist Teil von

• Nano letters, 2022-05, Vol.22 (9), p.3678-3684

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Inspired by electronic transistors, electric field gating has been adopted to manipulate ionic currents of smart nanofluidic devices. Here, we report a PNP nanofluidic bipolar junction transistor (nBJT) consisting of one polyaniline (PANI) layer sandwiched between two polyethylene terephthalate (PET) nanoporous membranes. The PNP nBJT exhibits three different responses of currents (quasi-linear, rectification, and sigmoid) due to the counterbalance between surface charge distribution and base voltage applied in the nanofluidic channels; thus, they can be switched by base voltage. Four operating modes (cutoff, active, saturation, and breakdown mode) occur in the collector response currents. Under optimal conditions, the PNP nBJT exhibits an average current gain of up to 95 in 100 mM KCl solution at a low base voltage of 0.2 V. The present nBJT is promising for fabrication of nanofluidic devices with logical-control functions for analysis of single molecules.