Structural and optical characterization of fresh water diatoms (Cyclotella sp.): Nature's nanoporous silica manufacturing plant

Nirmal Mazumder; Ankur Gogoi; Alak K. Buragohain; Gazi A. Ahmed; Amarjyoti Choudhury

doi:10.1117/12.2039793

Structural and optical characterization of fresh water diatoms (Cyclotella sp.): Nature's nanoporous silica manufacturing plant

Nirmal Mazumder, Ankur Gogoi, Alak K. Buragohain, Gazi A. Ahmed, Amarjyoti Choudhury

Department of Biophysics, Manipal School of Life Sciences, Manipal

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

Siliceous frustules were extracted from a representative fresh water diatom species (Cyclotella sp.) by treating with aqueous hydrochloric (HCl) acid. The structural characterizations of cleaned frustules were examined by scanning electron microscope (SEM). The microscopy images showed that the diatoms have a regular circular shape and are of almost equal size (average length is 9Î=m and average width is 3 μm). From energy dispersive X -ray spectroscopy (SEM-EDS) spot analysis it was confirmed that the frustules isolated from diatoms are composed mainly of silicon in the form of amorphous silica (SiO2). The bond information of chemical substances of diatom frustules was carried out at ambient temperature by means of Fourier Transform Infrared (FTIR) Spectroscopy. FTIR spectrum as recorded in transmittance mode showed the characteristic peaks for diatom biosilica, including for Si-O-Si stretching vibration at 1057 and 776 cm^-1. Photoluminescence (PL) measurements of diatom frustules were performed at room temperature and it was observed that they emitted strong blue PL centered at 440nm when excited with ultraviolet (UV) radiation.

Original language	English
Title of host publication	Quantum Dots and Nanostructures
Subtitle of host publication	Synthesis, Characterization, and Modeling XI
Publisher	SPIE
Volume	8996
ISBN (Print)	9780819499097
DOIs	https://doi.org/10.1117/12.2039793
Publication status	Published - 2014
Event	Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XI - San Francisco, CA, United States Duration: 03-02-2014 → 05-02-2014

Conference

Conference	Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XI
Country/Territory	United States
City	San Francisco, CA
Period	03-02-14 → 05-02-14

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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10.1117/12.2039793

Cite this

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title = "Structural and optical characterization of fresh water diatoms (Cyclotella sp.): Nature's nanoporous silica manufacturing plant",

abstract = "Siliceous frustules were extracted from a representative fresh water diatom species (Cyclotella sp.) by treating with aqueous hydrochloric (HCl) acid. The structural characterizations of cleaned frustules were examined by scanning electron microscope (SEM). The microscopy images showed that the diatoms have a regular circular shape and are of almost equal size (average length is 9{\^I}=m and average width is 3 μm). From energy dispersive X -ray spectroscopy (SEM-EDS) spot analysis it was confirmed that the frustules isolated from diatoms are composed mainly of silicon in the form of amorphous silica (SiO2). The bond information of chemical substances of diatom frustules was carried out at ambient temperature by means of Fourier Transform Infrared (FTIR) Spectroscopy. FTIR spectrum as recorded in transmittance mode showed the characteristic peaks for diatom biosilica, including for Si-O-Si stretching vibration at 1057 and 776 cm-1. Photoluminescence (PL) measurements of diatom frustules were performed at room temperature and it was observed that they emitted strong blue PL centered at 440nm when excited with ultraviolet (UV) radiation.",

author = "Nirmal Mazumder and Ankur Gogoi and Buragohain, {Alak K.} and Ahmed, {Gazi A.} and Amarjyoti Choudhury",

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Mazumder, N, Gogoi, A, Buragohain, AK, Ahmed, GA & Choudhury, A 2014, Structural and optical characterization of fresh water diatoms (Cyclotella sp.): Nature's nanoporous silica manufacturing plant. in Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XI. vol. 8996, 89960Y, SPIE, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XI, San Francisco, CA, United States, 03-02-14. https://doi.org/10.1117/12.2039793

Structural and optical characterization of fresh water diatoms (Cyclotella sp.) : Nature's nanoporous silica manufacturing plant. / Mazumder, Nirmal; Gogoi, Ankur; Buragohain, Alak K. et al.

Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling XI. Vol. 8996 SPIE, 2014. 89960Y.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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PY - 2014

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N2 - Siliceous frustules were extracted from a representative fresh water diatom species (Cyclotella sp.) by treating with aqueous hydrochloric (HCl) acid. The structural characterizations of cleaned frustules were examined by scanning electron microscope (SEM). The microscopy images showed that the diatoms have a regular circular shape and are of almost equal size (average length is 9Î=m and average width is 3 μm). From energy dispersive X -ray spectroscopy (SEM-EDS) spot analysis it was confirmed that the frustules isolated from diatoms are composed mainly of silicon in the form of amorphous silica (SiO2). The bond information of chemical substances of diatom frustules was carried out at ambient temperature by means of Fourier Transform Infrared (FTIR) Spectroscopy. FTIR spectrum as recorded in transmittance mode showed the characteristic peaks for diatom biosilica, including for Si-O-Si stretching vibration at 1057 and 776 cm-1. Photoluminescence (PL) measurements of diatom frustules were performed at room temperature and it was observed that they emitted strong blue PL centered at 440nm when excited with ultraviolet (UV) radiation.

AB - Siliceous frustules were extracted from a representative fresh water diatom species (Cyclotella sp.) by treating with aqueous hydrochloric (HCl) acid. The structural characterizations of cleaned frustules were examined by scanning electron microscope (SEM). The microscopy images showed that the diatoms have a regular circular shape and are of almost equal size (average length is 9Î=m and average width is 3 μm). From energy dispersive X -ray spectroscopy (SEM-EDS) spot analysis it was confirmed that the frustules isolated from diatoms are composed mainly of silicon in the form of amorphous silica (SiO2). The bond information of chemical substances of diatom frustules was carried out at ambient temperature by means of Fourier Transform Infrared (FTIR) Spectroscopy. FTIR spectrum as recorded in transmittance mode showed the characteristic peaks for diatom biosilica, including for Si-O-Si stretching vibration at 1057 and 776 cm-1. Photoluminescence (PL) measurements of diatom frustules were performed at room temperature and it was observed that they emitted strong blue PL centered at 440nm when excited with ultraviolet (UV) radiation.

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Y2 - 3 February 2014 through 5 February 2014

ER -

Structural and optical characterization of fresh water diatoms (Cyclotella sp.): Nature's nanoporous silica manufacturing plant

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