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Sustainable approach toward synthesis of green functional carbonaceous 3-D micro/nanostructures from biomass.

Tavangar A, Tan B, Venkatakrishnan K - Nanoscale Res Lett (2013)

Bottom Line: Our results demonstrate that by controlling the laser fluence, structures with a variety of different morphologies from nanostructures to microstructures can be achieved.Also, the results indicate that altering the laser processing parameters influences the chemical composition of the synthesized structures.These structures, as-synthesized or as nanocomposite fillers, can have practical uses in electronic, sensing, biological, and environmental applications.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada. venkat@ryerson.ca.

ABSTRACT
This study proposes a novel technique to synthesize functional carbonaceous three-dimensional (3-D) micro/nanocompounds from agricultural by-products using femtosecond laser irradiation. Biowastes of rice husk and wheat straw are value-engineered to carbonaceous structures in a single-step process under ambient conditions. Our results demonstrate that by controlling the laser fluence, structures with a variety of different morphologies from nanostructures to microstructures can be achieved. Also, the results indicate that altering the laser processing parameters influences the chemical composition of the synthesized structures. This sustainable approach presents an important step towards synthesizing 3-D micro/nanofibrous compounds from biowaste materials. These structures, as-synthesized or as nanocomposite fillers, can have practical uses in electronic, sensing, biological, and environmental applications.

No MeSH data available.


Related in: MedlinePlus

SEM micrographs of the structures synthesized from wheat straws by 1,300 consecutive laser pulses. The laser pulse energies were (a) 0.19 and (b) 0.38 mJ.
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Figure 4: SEM micrographs of the structures synthesized from wheat straws by 1,300 consecutive laser pulses. The laser pulse energies were (a) 0.19 and (b) 0.38 mJ.

Mentions: The experiments were carried on at different numbers of laser pulses on both rice husk and wheat straw specimens. FiguresĀ 3 and 4 illustrate the structures synthesized at different numbers of laser pulses on rice husk and wheat straw substrates, respectively. Decreasing the number of pulses hitting the target leads to a reduction in the laser fluence transferred to a substrate. This results in a decrease in plume volume and nucleus density inside it, which will lead to the generation of microstructures rather than nanofibrous structures.


Sustainable approach toward synthesis of green functional carbonaceous 3-D micro/nanostructures from biomass.

Tavangar A, Tan B, Venkatakrishnan K - Nanoscale Res Lett (2013)

SEM micrographs of the structures synthesized from wheat straws by 1,300 consecutive laser pulses. The laser pulse energies were (a) 0.19 and (b) 0.38 mJ.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3750559&req=5

Figure 4: SEM micrographs of the structures synthesized from wheat straws by 1,300 consecutive laser pulses. The laser pulse energies were (a) 0.19 and (b) 0.38 mJ.
Mentions: The experiments were carried on at different numbers of laser pulses on both rice husk and wheat straw specimens. FiguresĀ 3 and 4 illustrate the structures synthesized at different numbers of laser pulses on rice husk and wheat straw substrates, respectively. Decreasing the number of pulses hitting the target leads to a reduction in the laser fluence transferred to a substrate. This results in a decrease in plume volume and nucleus density inside it, which will lead to the generation of microstructures rather than nanofibrous structures.

Bottom Line: Our results demonstrate that by controlling the laser fluence, structures with a variety of different morphologies from nanostructures to microstructures can be achieved.Also, the results indicate that altering the laser processing parameters influences the chemical composition of the synthesized structures.These structures, as-synthesized or as nanocomposite fillers, can have practical uses in electronic, sensing, biological, and environmental applications.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada. venkat@ryerson.ca.

ABSTRACT
This study proposes a novel technique to synthesize functional carbonaceous three-dimensional (3-D) micro/nanocompounds from agricultural by-products using femtosecond laser irradiation. Biowastes of rice husk and wheat straw are value-engineered to carbonaceous structures in a single-step process under ambient conditions. Our results demonstrate that by controlling the laser fluence, structures with a variety of different morphologies from nanostructures to microstructures can be achieved. Also, the results indicate that altering the laser processing parameters influences the chemical composition of the synthesized structures. This sustainable approach presents an important step towards synthesizing 3-D micro/nanofibrous compounds from biowaste materials. These structures, as-synthesized or as nanocomposite fillers, can have practical uses in electronic, sensing, biological, and environmental applications.

No MeSH data available.


Related in: MedlinePlus