A Supramolecular Gel of Oxalic Acid‐Monoethanolamine for Potential Schottky Barrier Diode Application

Abstract

A functional supramolecular gel of oxalic acid and monoethanolamine (OXMEA) has been achieved through direct instant mixing of N,N-dimethyl formamide (DMF) solution of oxalic acid and pure monoethanolamine at room temperature under ambient condition. The rheological analysis established the viscoelastic semi-solid type nature of mechanically stable OXMEA supramolecular gel. The morphological pattern, imaged through field emission scanning electron microscopic investigation, explores the bean-seed like hierarchical architecture of the gel network. The semiconducting property of the gel was verified from band gap energy and conductivity estimation. The electrical charge transport property was also analyzed in the form of OXMEA gel based metal-semiconductor junction thin film device. The obtained nonlinear current-voltage characteristics of the device signify Schottky barrier diode nature of the synthesized gel. Overall, this work has been proof of development of semiconducting electronic device by OXMEA gel based gel medium.

Protein-Based Self-Healing Cu(II)-Metallohydrogels: Efficient Third-Order Nonlinear Optical Materials in Terms of an Intensity-Dependent Refractive Index and Two-Photon Absorption

“…The values of the optical nonlinear absorption coefficients (β eff ) at intensity 283 GW/cm 2 of the metallohydrogels BSA@CuA and BSA@CuCl are (0.0662 ± 0.0002) cm/GW and (0.0540 ± 0.0001) cm/GW, respectively, which indicates that BSA@CuA is showing higher nonlinear absorption than BSA@CuCl. Because UV–visible absorption spectra (see Figure S8 in the Supporting Information) show that the absorption is maximum at ∼ 275 nm for BSA-CuA and ∼290 nm for BSA-CuCl, following the literature − and by analysis of UV–Vis absorption data, the optical band gap for BSA-CuA and BSA-CuCl is calculated. The calculated optical band gap of BSA-CuA and BSA-CuCl is ∼2.37 and ∼2.82 eV, respectively.…”

Cd-Based Metallohydrogel Composites with Graphene Oxide, MoS2, MoSe2, and WS2 for Semiconducting Schottky Barrier Diodes

“…The panorama of gel research has forced the creation of new functional devices to an innovative high. Functional organic–inorganic hybrid materials, especially the supramolecular metallogels, have potential applications over a diverse area of materials science covering medical diagnostics, tissue engineering, biomineralization, cell culturing, drug delivery, lithography, catalysis, electrochemical and optoelectronic devices, chemosensors, redox responsiveness, magnetic materials, conductivity, actuators, optical activity, nanoelectronics and nanoscience, foods, cosmetics, charge transportation, energy storage, environment, logic gates, photophysics, and electron emission. − The semisolid-like nature of a supramolecular gel , usually originates through several noncovalent interactions like hydrogen bonding, van der Waals forces, ion–ion, ion–diople, dipole–dipole, π–π, cation−π, anion−π, and hydrophobic . Usually, different polymeric, − oligomeric, and π gelators by arresting polar or nonpolar , solvent molecules within their 3D matrixes lead to materialization of different soft gel scaffolds.…”

“…The gel-based flexible-type semiconducting system is very efficient at fabricating diodes with desirable shape and positional manageability of the devices . Additionally, the organic LMWG also offers a perfect soft scaffold for electron transportation …”

“…1−5 The semisolid-like nature of a supramolecular gel 6,7 usually originates through several noncovalent interactions like hydrogen bonding, van der Waals forces, ion−ion, ion−diople, dipole−dipole, π−π, cation−π, anion−π, and hydrophobic. 8 Usually, different polymeric, 9−12 oligomeric, 13 and π gelators 14 by arresting polar 5 or nonpolar 6,7 solvent molecules within their 3D matrixes lead to materialization of different soft gel scaffolds.…”

Organic-Acid-Mediated Luminescent Supramolecular Tb(III)-metallogel Applied in an Efficient Photosensitive Electronic Device with Excellent Charge Transport Properties

“…During the gel formation, the solvent molecules are immobilized in a three-dimensional (3D) supramolecular network of gelator molecules, and the gel formation is primarily identified by an inversion-vial test . Different solvents, such as alcohols (i.e., ethanol, methanol), water, dimethyl sulfoxide (DMSO), acetonitrile, dimethylformamide, dichloromethane, deuterated dichloromethane, carbon tetrachloride, acetone, 1,2-dichlorobenzene, tetrahydrofuran, toluene, etc., are entrapped by versatile gelators having organic and/or inorganic constituents during the formation of soft 3D gel scaffolds. Apart from various polymeric and oligomeric gelators, the research on low-molecular-weight gelators has rapidly gained attention.…”