Malaysian NANO-An International Journal

Nanocellulose-based carbon nanocomposite for the electrochemical sensing application for pharmaceuticals: A review

2023-03-07T15:34:41+08:00

Biopolymers are naturally occurring polymers which have attained profound interest and are investigated widely due to their outstanding characteristics and several advantages such as cost efficiency, hydrophilicity, film formation capability, chemical inertness, non-toxicity, high mechanical integrity and biocompatibility. Cellulose is the most abundant biopolymer in the world. Nanocellulose (NC) is a cost-efficient, biodegradable, eco-friendly, biocompatible and abundant, renewable biomaterial obtained from cellulose by nanoscale isolation. The most interesting property of NC as the precursor material, is that it does not possess hierarchical structural defect. Recently, the incorporation of NC into electroconductive platforms i.e., nanostructured carbon nanocomposite is a hot topic for researchers. NC is not an electroconductive material but an ionic conductor. Availing this property NC can be incorporated with carbon-based materials. CNTs is a carbon-based material with excellent electronic properties, high electroconductive and mechanical properties. This review focuses on the application of nanocomposites containing NC and carbon nanostructured especially CNTs and their properties and sensing applications.

Synthesis and characterization of nanoscale level mono/bi-ligated metal(II) complexes

2023-06-09T10:22:51+08:00

A series of nanoscale level metal complexes with bidentate (N2MCl2) and tetradentate (MN) chromophores as cisplatin analogues and intercalating agents of, [M(phen)Cl2] (1- 3), [M(bpy)Cl2] (4-6), [M(phen)2] (7-9) and [M(bpy)2] (10-12) (where respectively M = Cu(II), Ni(II) or Zn(II); phen = 1,10-phenanthroline and bpy = 2,2’-bipyridine) respectively were prepared in the present investigation. These complexes were prepared by sonochemical technique and characterized using elemental, spectral, and electrochemical techniques. Their nanorod or stick morphologies and crystalline nature were evaluated with scanning electron microscopy (SEM). Metal complexes, 1-6 are existing with two labile chlorides similar to the chemotherapeutic inorganic drug cisplatin, which may anticipate binding covalently with herring sperm DNA, While, complexes, 7-12 may undergo an intercalative mode of binding due to their structural differences relative to 1-6.

Investigation of energy storage applications on nickel fluoride nanomaterials under shock wave flow environments

2023-06-19T15:30:46+08:00

In this research article, we have conducted the comparative studies on ambient and 200 shock loaded NiF₂ sample using a table top pressure-driven shock tube (Reddy Tube) for supercapacitor application. The stability of structural, morphological and electrochemical properties of the shock loaded and unloaded were tested and analysed. The shock wave of 2.2 Mach number with transient pressure of 2.0 MPa with 864 K temperature was made to strike on two test samples (ambient and 200). The molecular and crystallite structure stabilities of the test samples were examined by XRD and FTIR. The surface morphology was investigated by FESEM and electrochemical measurements such as Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD) techniques were performed to investigate the super capacitive behaviour of NiF₂ sample for loaded and unloaded conditions. The obtained results revealed changes in crystallite size and particle size and it still maintains its phase stability of rutile NiF₂ after 200 shocked conditions. Further, the electrochemical measurements exhibit higher capacitance of 1770.5 F/g for 200 shock loaded condition which is very high range when compared with ambient condition. Furthermore, it measured high energy density (88.52 Wh/kg) and power density (1499.8 W/kg) at 2 A/g current density which is very higher compared to others. Hence under high shocked conditions, the electrochemical properties were enhanced due to shock wave impacts on the NiF₂ material.

Multilayered nano Ti3C2Tx electrode: An ultrasensitive electrochemical sensor for rutin antioxidant detection

2023-07-11T15:42:14+08:00

Multilayer two-dimensional (2D) structures (MXenes) provide promising advantages in biomedical applications. Using SEM and XRD characterization techniques, the synthesized substance was identified. Our results show that Ti₃C₂Tx-GCE possesses a significant number of active sites, enhancing its electrocatalytic activity and electrochemical sensing abilities for RT oxidation. The multilayered Ti₃C₂Tx-GCE that was produced had good electrochemical properties and acceptable pore structures. Additionally, it exhibited remarkable linearity starting from 1 to 10 μM and demonstrated high sensitivity for the electrochemical measurement of RT, with an impressively low limit of detection (LOD) of 0.345 μM. EIS studies revealed that the synthesized multilayered Ti₃C₂Tx possessed a significantly low charge transfer resistance and a high electron transfer rate constant. Our research lays the groundwork for designing a multilayered Ti₃C₂Tx network, which opens up intriguing possibilities for creating high-performance electrochemical sensors for use in biomedicine and clinical settings.