The recent trend of science and technology has shown a convergence from the macroscopic and microscopic levels to the nano and quantum scale. Over the past two decades, nanotechnology, a branch of engineering science that deals with creating objects smaller than 100 nm in dimension, has significantly advanced electronics, medicine, and materials, catalysis, and industrial engineering. This revolution has spawned activities affecting the social, economic, and environmental spheres, often in ways that are entirely unforeseen. Recent advances in material science and nanotechnology have given rise to a myriad of developments, while in the mean time call for research into the impacts of nanomaterials on the environment and human health. Although considerable progress has been made in the past decade concerning the behavior of nanomaterials in biological systems, such understanding is critically lacking with respect to the fate of nanomaterials in ecosystems.Biomaterials are sensitive when they are isolated out of their natural environment, so these applications usually require their integration into biocompatible abiotic matrices,Carbon nanotubes increases photosynthesis in green algae, photosynthesis of algae takes place in limited intensity of light, Carbon nanotubes of different size helps to absorb light of different intensities even UV and infrared also which harms microalgae as they have simple cell structure. Application of carbon nanotubes protect the algal cell from cell damage and enhance the photosynthetic activity .

1. (An Autonomous Institute affiliated to
Madurai Kamaraj University;Re-accredited
with ‘A’ status by NAAC)
Madurai -9

2. by
V.JAYALAKSHMI
Under the guidance of
Dr.K.JEGATHEESAN M.Sc.,M.Phil.,M.Tech., Ph.D
Assistant Professor
Department of Botany

3. Introduction
Nanotechnology
• Macroscopic & microscopic
levels to nano scale.
• Less than 100nm in dimension.
Bionic Plants
• Infusing CNT at cellular level
• To improve photosynthesis and
add new functionality

4.  Size:less or equal to 100 nm
 Different size of CNT –different
wavelength of light
 Dilution of CNT –detect
envirnomental pollutants
 Plants with CNT -Detectors for
explosives in airports

5. OBJECTIVES
•To synthesize carbon nanotubes from
charcoal powder using plant extracts.
•To Characterize the synthesized
carbon nanotubes using absorption
spectrum and FTIR.
•To enhance the photosynthetic ability
of microalgae (Chlorella) using carbon
nanotubes

6. materials
Coconut shell charcoal Activated charcoal Chlorella
Tecoma stans Phyllanthus emblica Acalypha indica Phyllanthus amarus

7. Methodology
Phytomediated synthesis of CNT

8. Synthesis of CNT by chemical method
 Need for surveillance of
environmental and security
risks
Activated charcoal Coconut shell charcoal
Chemicals like Sulphuric acid , Nitric acid and Potassium chlorate
was used.

9. Characterization of carbon nanotubes
Visible spectroscopic analysis
Coconut shell charcoal and plant extract
0
0.2
0.4
0.6
0.8
410
470
490
520
540
580
610
640
wavelength
A
b
s
Phyllanthus amarus Phyllanthus emblica Tecoma stans Acalypha indica
0
0.05
0.1
0.15
0.2
0.25
410470490520540580610640
wavelength
A
b
s
Activated charcoal and plant extract

10. Characterization of carbon nanotubes for chemically
synthesized CNT
Coconut shell charcoal
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
410 470 490 520 540 580 610 640
wavelength nm
A
b
s
Activated charcoal

11. FTIR Spectroscopic analysis
Coconut shell charcoal
Phyllanthus amarus Phyllanthus emblica Tecoma stans Acalypha indica
Activated charcoal

12. FTIR SPECTROSCOPIC ANALYSIS OF
CHEMICALLY SYNTHESIZED CNT
Coconut shell charcoal
Activated charcoal

13. ESTIMATION OF PHOTOSYNTHETIC RATE IN MICROALGAE
Control Activated charcoal Coconut shell charcoal
Coconut shell charcoal CNT Activated charcoal CNT

14. Conclusion
 Nanotechnology is a brand new technology that has
just began, it is a revolutionary science that will change
all what we knew before.
 chemical and green synthesized carbon nanotubes
were tested for their effect of photosynthetic rate in
microalgae system (Chlorella).
The result shows that CNT particles can be used for
enhancing the photosynthetic rate of microalgae which
in turn enhances lipid production thereby enhancing
the biofuel production

15. THANK YOU