Michelle Darmawan

11 Questions 23 Answers 0 Followers

Questions related from Michelle Darmawan

Has the formation of my silver nanoparticles been indicated by the provided UV-Vis spectrum?

I'm trying to produce silver nanoparticles using plant extract, but I didn't observe the expected peak in the UV-Vis spectrum between 380-420 nm, where silver nanoparticles typically appear. After...

05 May 2024 6,329 11 View

What are the best solvents and plant extraction methods in the green synthesis of silver nanoparticles ?

1. Which form of plant extracts shows the greatest potential for green synthesis of silver nanoparticle: - direct homogenization with deionized water followed by filtration or centrifugation,...

03 May 2024 7,639 2 View

How can I stabilize a thick ethanol extract dissolved in water for AgNP green synthesis?

Initially, I conducted maceration with a 70% ethanol solvent for 3x24 hours to obtain the thick extract. For the AgNP synthesis, the thick plant extract needs to be dissolved using deionized...

05 April 2024 6,858 4 View

What's the ideal apparatus for AgNP biosynthesis? Can plant extract metabolites, crucial for AgNP reduction, withstand 121°C in 20 minutes autoclave ?

I am planning to synthesize AgNP using plant extract as a bioreductor. In the green synthesis approaches of silver nanoparticles, should I focus solely on preventing the degradation temperature of...

20 March 2024 8,177 4 View

What is the correct way to prepare a 1 mM AgNO3 solution ?

I have come across suggestions for optimizing the biosynthesis of silver nanoparticles to achieve smaller particles (

20 March 2024 6,930 5 View

After purification by centrifugation and washing with deionized water, what are the subsequent steps to produce silver nanoparticle AgNP?

1. If I air dry the sample overnight, how should I prepare it for UV-Vis, FTIR, DLS, and SEM/TEM characterization? 2. Do I need to add a buffer to maintain sample solubility? Should the...

20 March 2024 4,814 5 View

What are the best approaches for designing the green synthesis production of silver nanoparticles?

Is it more effective to optimize the ratio of plant extract to AgNO3, or should I adjust the final concentration of AgNO3 in a fixed concentration of plant extract, considering the optimization of...

20 March 2024 1,146 4 View

Is there any tolerance limit for the presence of the lowest wavelength peak (a blue shift) that still indicates the presence of AgNP?

Many references suggest that the formation of AgNPs is characterized by a single peak at lambda 380-420 nm. Additionally, are there any guidelines regarding the timing of characterization? I've...

20 March 2024 4,435 2 View

How can I optimize the pH of biosynthesis AgNP? Is it acceptable to use chemical reagents to adjust the pH in green synthesis approaches?

I am planning to synthesize AgNP using plant extract as a bioreductor. I have come across several papers recommending a neutral to alkaline pH range (pH 7-8) to achieve silver nanoparticles with...

20 March 2024 1,145 4 View

Why do silver nanoparticles synthesized using different plant extracts exhibit variations in antibacterial activity, size characteristics, etc.?

In the green synthesis approaches of silver nanoparticles, do plant extracts solely influence secondary metabolite compounds that act as reducing agents and antioxidants? Or do the antibacterial,...

20 March 2024 7,985 4 View

How much yield of AgNP is typically obtained in one batch of green synthesis with plant extract?

I am currently undertaking the synthesis of AgNP utilizing plant extract as a bioreductor. The synthesis procedure involved reacting the plant extract with 1 mM AgNO3 while optimizing the ratio....

20 March 2024 9,238 2 View