pH-Sensing Strips Based on Biologically Synthesized Ly-MgO Nanoparticles

Area of Science:

• Nanotechnology
• Green Chemistry
• Materials Science

Background:

• Magnesium oxide nanoparticles (MgO NPs) have broad applications but limited toxicity data.
• Assessing environmental impact and developing safe nanomaterials is crucial.

Purpose of the Study:

• To evaluate the toxicity and pH-sensing capabilities of l-lysine-modified MgO (Ly-MgO) nanoparticles.
• To synthesize Ly-MgO NPs using a green chemistry approach with clove extract.

Main Methods:

• Green synthesis of Ly-MgO NPs using clove bud extract.
• In vitro toxicity assessment on green gram seeds and bacterial strains.
• Development and testing of pH-sensing strips using Ly-MgO nanostructures across a wide pH range.

Main Results:

• Ly-MgO NPs exhibited 105% biocompatibility with green gram seeds at 100 ppm.
• No inhibition of growth was observed for two tested bacterial strains.
• pH-sensing strips demonstrated reliable performance and repeatability from pH 2.0 to 13.0.

Conclusions:

• Concentration is a key factor in Ly-MgO NP toxicity.
• Ly-MgO NPs are biocompatible and non-toxic to tested organisms.
• Nanoparticle-based pH strips offer a simple, reliable, and affordable pH measurement method.