2D Materials (WS2, MoS2, MoSe2) Enhanced Polyacrylamide Gels for Multifunctional Applications

Abstract

Multifunctional polymer composite gels have attracted attention because of their high thermal stability, conductivity, mechanical properties, and fast optical response. To enable the simultaneous incorporation of all these different functions into composite gels, the best doping material alternatives are two-dimensional (2D) materials, especially transition metal dichalcogenides (TMD), which have been used in so many applications recently, such as energy storage units, opto-electronic devices and catalysis. They have the capacity to regulate optical, electronic and mechanical properties of basic molecular hydrogels when incorporated into them. In this study, 2D materials (WS2, MoS2 and MoSe2)-doped polyacrylamide (PAAm) gels were prepared via the free radical crosslinking copolymerization technique at room temperature. The gelation process and amount of the gels were investigated depending on the optical properties and band gap energies. Band gap energies of composite gels containing different amounts of TMD were calculated and found to be in the range of 2.48–2.84 eV, which is the characteristic band gap energy range of promising semiconductors. Our results revealed that the microgel growth mechanism and gel point of PAAm composite incorporated with 2D materials can be significantly tailored by the amount of 2D materials. Furthermore, tunable band gap energies of these composite gels are crucial for many applications such as biosensors, cartilage repair, drug delivery, tissue regeneration, wound dressing. Therefore, our study will contribute to the understanding of the correlation between the optical and electronic properties of such composite gels and will help to increase the usage areas so as to obtain multifunctional composite gels.

Exfoliation of MoS2 Quantum Dots: Recent Progress and Challenges

“…LTMDs-based multifunctional polymer composite gels with tunable optical and mechanical properties can be useful in various applications such as biosensors, cartilage, tissue repairing, drug delivery, and wound dressing. The properties of these gels are easily tuned by the amount of the MoS 2 and other LTMDs [112]. In water purification and treatment applications, biocompatibility and nontoxicity are the most important features, therefore the appropriate choice could be the MoS 2 QDs and nanosheets exfoliated by the cryo-mediated exfoliation process.…”

Ambipolar‐To‐Unipolar Conversion in Ultrathin 2D Semiconductors

“…A variety of gate modulation configurations have been used to produce high‐performance electrical and optoelectronic devices such as high k dielectrics (Al 2 O 3 , CaF 2 , and HfO 2 ), ionic liquids, [ 98 ] gels, [ 99 ] and ferroelectric materials. [ 100 ] For nanodevices that use low operating voltage and low power, ultra‐k dielectric materials are suitable.…”

Enhancing the efficiency of polypyrrole-dodecylbenzene sulfonic acid in-tube solid-phase microextraction coating for analysis of nitrogen-containing pesticides in water environments

“…However, pure PPy exhibits low thermal stability (thermal decomposition temperature of approximately 230 °C) and a small surface area, limiting its application in extraction performance (Ju et al, 2022;Wu et al, 2022). To overcome these limitations, doping with other materials has become an effective strategy to improve PPy's performance (Yin et al, 2022;Zhang et al, 2022;Özuğur Uysal et al, 2022). For example, surfactant-doped polypyrroles not only improve their thermal and mechanical stability but also greatly enhance the performance of the adsorbent through the functional groups such as sulfonic acid, benzene ring, and long alkyl chain in their molecular structure (Begum et al, 2021;Jain et al, 2023).…”