Langmuir, Raman, and electrical properties comparison of calixarene and calixarene-rGO using Langmuir Blodgett (LB) tech
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Langmuir, Raman, and electrical properties comparison of calixarene and calixarene-rGO using Langmuir Blodgett (LB) technique Darvina C. K. Lim1, Faridah L. Supian1,* 1 2
, and Yanuar Hamzah2
Department of Physics, Faculty of Science and Mathematics, Sultan Idris Education University (UPSI), Tanjong Malim, Malaysia Department of Physics, FMIPA Universitas Riau, Kampus Bina Wydia, 28132 Pekanbaru, Indonesia
Received: 23 June 2020
ABSTRACT
Accepted: 31 August 2020
A layered composites of calix[4]arene, namely, THC4-rGO, was produced from calix[4]arene-25,26,27,28-tetrol (THC4) and reduced graphene oxide (rGO) using the Langmuir–Blodgett (LB) technique. THC4 and rGO were prepared in a solution form first, then by using the LB technique to form LB films which were then deposited onto a quartz surface for Raman and electrical study. Langmuir property such as surface pressure-area (P-A) isotherms of THC4 and rGO were used to study the intermolecular interactions at air–water interface. Raman spectroscopy was used to observe the crystallinity of the composites. The electrical properties by using four-point probe, i.e., I–V curves, resistivity, and conductivities of the rGO and THC4-rGO were analyzed to illustrate the enhanced properties. The results from this study can be utilized for the potential application of electronic sensors using calix[4]arene.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction Calixarenes are a group of cavity-shaped cyclic molecules, with their phenol units linked together by alkylidene groups. Calixarenes are basket-shaped cyclic nanostructures that usually float on air–water subphase due to their amphiphilic property. There are various types of calixarene, namely, Calix[4]arene, Calix[6]arene, and Calix[8]arene. The most common Calix[4]arene used in this study is the Calix[4]arene-25,26,27,28-tetrol (THC4), which is comprised of four phenol units. Calixarenes are referred to as the third generation of supramolecule
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https://doi.org/10.1007/s10854-020-04392-6
[1]. The potential of this nanomaterial is due to its ability and selectivity toward each type of ions, molecules, or other substances that have established the calixarene chemistry. Langmuir–Blodgett (LB) technique is a powerful method for air–water interface studies. It is a technique commonly used in the study of calixarenes to produce uniform calixarene monolayers due to the amphiphilic property of calixarenes. Examples of calixarene used in previous studies which employed the LB technique are calix[6]arene-37, 38, 39, 40, 41, 42-hexol and 49, 50, 51, 52, 53, 54, 55, 56-octahydroxycalix[8]arene [2–4].
J Mater Sci: Mater Electron
Reduced graphene oxide rGO has emerged as one of the potential reaction partners for supramolecules such as cyclodextrin and calixarene due to the synergistic effect such as sensitive electrochemical response towards various guests [5–10]. It has been reported that three kinds of water-soluble p-sulfo
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