بنام خداوند سبحان

Biological synthesis of silver nanoparticles, focusing on algae: non-toxic

and eco-friendly way of nanotechnology for a promising future

Hamid Salari Joo

Related teacher: Prof. Kalbassi

3 methods of synthesis

Physical

Chemical

Biological

2 approaches- bottom up approach- top down approach

Marine bio-nanotechnology is an exciting and upcoming area of research. The biologically diverse marine environment has a great promise for nanoscience and nanotechnology.

Experimental

Capillacae (Pc) J. Rubins (Jr) C. Sinusa (Cs) Faciata (Uf)

1. Algae 2. Fabrics

Desized

Methods Extraction of water soluble Polysaccharides

Chemical analysis of Crude Hot Water Soluble

Polysaccharides (CHWPS)

Acid hydrolysis of polysaccharides

GLC analysis of the hydrolyzated polysaccharide

Synthesis of Silver nanoparticles (Ag-NPs)

Characterization of Silver nanoparticles

3) TEM analysis

2) FTIR analysis.

Treatment of cotton fabrics

Antimicrobial activity.

1) UV–visible spectral

analysis.

R = reduction rate in the number of colonies

A = number of bacterial colonies from untreated fabrics

B = number of bacterial colonies from treated fabrics

Results

Results

Results

Results

• The organizational key is that techniques carry out a method which is consistent with an approach.

• An approach = dealing with something

• Method = a particular way of doing something:

• A method is more explicitly thought out. A good method details each step of the plan.An approach is more general. It could be merely the way you set about doing things