4.6 Article

Self-assembled photo-responsive black phosphorus-azobenzene composite Langmuir films with chemical gas sensor and photoelectric conversion applications

Publisher

ELSEVIER
DOI: 10.1016/j.colsurfa.2021.126811

Keywords

Black phosphorus; Azobenzene; Langmuir-Blodgett film; Gas sensor; Photoisomerization photoelectric conversion

Funding

  1. National Natural Science Foundation of China [21872119, 22072127]
  2. Talent Engineering Training Funding Project of Hebei Province [A201905004]

Ask authors/readers for more resources

The reasonable design of various functionalized nanocomposites based on black phosphorus has attracted substantial attention, leading to the successful exfoliation of bulk BP into nanosheets. The synthesized Langmuir composite films show promising potential in terms of photoisomerization stability and gas responsiveness. Additionally, the self-assembled films based on BP demonstrate high photoelectric conversion efficiency, indicating their potential applications in a wide range of nano-optical devices and optoelectronic devices.
The reasonable design of various functionalized nanocomposites based on black phosphorus (BP) has sparked substantial attention from researchers. In this work, the bulk BP was successfully exfoliated into nanosheets (BPNS), the polyethyleneimine (PEI) was selected as the surface protective layer to modify the BPNS for strengthening its stability. We have designed and synthesized two kinds of BPNS-PEI Langmuir composite films containing azobenzene compounds (BPNS-PEI/N-Azo and BPNS-PEI/PAA-Azo) by Langmuir-Blodgett (LB) technology. The composite films were successfully assembled and analyzed the nanoscale structure and morphology using transmission electron microscopy (TEM), atomic force microscopy (AFM), scanning electron microscopy (SEM) and other different characterization methods. In addition, the BPNS-PEI/N-Azo composite films were proven to demonstrate the photoisomerization stability and the acidalkali atmosphere gas responsiveness by ultraviolet-visible spectroscopy and Fourier transform infrared spectroscopy. Furthermore, the photoelectrochemistry performances of the acquired LB composite films were studied by transferring multilayer films on indium tin oxide (ITO) substrates. And the results demonstrated that the BPNS-PEI/N-Azo self-assembled LB film electrode showed higher photoelectric conversion efficiency. The self-assembled films based on BP, undertaking an appealing conception for gaining a wide range of nano-optical devices, gas sensors and optoelectronic devices.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available