Solution‐Processable Carbon Nanotube Nanohybrids for Multiplexed Photoresponsive Devices

Abstract

Here, the formation of carbon nanotube (CNT)-based nanohybrids in aqueous solution is reported, where DNA-wrapped CNTs (DNA-CNTs) act as templates for the growth of PbS and CdS nanocrystals, toward the formation of PbS-DNA-CNT and CdS-DNA-CNT heterostructures. Solution-processed multiplexed photoresponsive devices are fabricated from these nanohybrids, displaying a sensitivity to a broad range of illumination wavelengths (405, 532, and 650 nm). The DNA-CNT and CdS-DNA-CNT devices show a drop in the current while PbS-DNA-CNT's current increases upon light illumination, indicating a difference in the operational mechanisms between the hybrids. Furthermore, the ON/OFF photoresponse of PbS-DNA-CNT is only 1 s as compared to 200 s for the other two nanohybrid devices. The mechanisms of the different photoresponses are investigated by comparing the performance under an inert and air atmosphere, and gate dependence device analysis and transient absorption spectroscopy measurements are also conducted. The results reveal that photoinduced oxygen desorption is responsible for the slower photoresponse by DNA-CNT and CdS-DNA-CNT, while photoinduced charge transfer dominates the much faster response of PbS-DNA-CNT devices. The strategy developed is of general applicability for the bottom-up assembly of CNT-based nanohybrid optoelectronic systems and the fabrication of solution-processable multiplexed devices.

Quantum enhanced efficiency and spectral performance of paper-based flexible photodetectors functionalized with two dimensional materials

“…The response time of paper-based PD holds significant importance as it directly detects the changes in incident light intensity accurately and quickly. Herein, we have explored different routes for the enhancement of response time in paper-based PD [119][120][121]. For instance, (a) material optimization plays an important role to improve the response time.…”

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

“…Researchers often use hybridization to create many materials with specific properties and functions. Because of these properties, these hybrid materials are usually used for catalysts, [177][178][179] photoresponsive devices, [180] electrochromic devices, [176] organic thermoelectric devices. [181,182] The idea of using these hybridized materials for MAs has also been considered by researchers who have discovered that some of these hybridized materials have a powerful ability to capture light, which led to the emergence of MAs using hybrid materials, [183][184][185][186] and through the unremitting efforts of researchers, many BMAs using hybrid materials have been successfully designed, [126,187,140] which have contributed significantly to the development and applications of BMAs.…”

1D and 2D Field Effect Transistors in Gas Sensing: A Comprehensive Review

“…In 2009, Peng et al proposed a FET fabricated with ACdielectrophoresis (AC-DEP) aligned SWCNTs between Ti/Au contacts on a SiO 2 (200 nm)/Si wafer, [142] a technique often proposed for the manufacturing of an aligned array of CNTs. [143][144][145][146] Authors suggested the Schottky behavior of the CNT/metal junction. 500 nm thick Si 3 N 4 passivation layer was deposited by plasma enhanced CVD (PE-CVD) to fabricate FP, NP, CE, and JE -FETs.…”