Highly\nTransparent and Transferable Ultralong Carbon\nNanotube Networks for Transparent Wearable Electronics

Recent\nadvances in transparent wearable electronics highlighted\nthe need for flexible conductive layers with high transmittance. Carbon\nnanotubes (CNTs) are ideal candidates for constructing transparent\nconductive networks due to their excellent flexibility, desirable\noptical properties, and outstanding electrical characteristics. However,\ntheir performance is severely degraded by the junction resistance\nbetween individual CNTs. Herein, we prepared nearly invisible and\ntransferable ultralong CNT conductive networks with high transmittance\n(>99% at 550 nm). The centimeter-scale length of ultralong CNTs\nfacilitated\nthe successful assembly of conductive and suspended networks with\na minimal thickness, absorption area, and junction density, enabling\nultrahigh transmittance and transferability. Further, we developed\nan ultralong CNT-based flexible and transparent pressure sensor to\nverify their practical value. The sensor exhibited a high sensitivity\n(225.11 kPa<sup>–1</sup>), a broad operating range (up to 160\nkPa), a rapid response time (11 ms), and robust stability over 10,000\ncycles, outperforming most state-of-the-art transparent pressure sensors.\nThis work shows the promising application potential of ultralong CNTs\nin high-performance transparent wearable electronics.