Limits...
Biosynthesis of luminescent CdS quantum dots using plant hairy root culture.

Borovaya MN, Naumenko AP, Matvieieva NA, Blume YB, Yemets AI - Nanoscale Res Lett (2014)

Bottom Line: Transmission electron microscopy of produced quantum dots revealed their spherical shape with a size predominantly from 5 to 7 nm.Electron diffraction pattern confirmed the wurtzite crystalline structure of synthesized cadmium sulfide quantum dots.These results describe the first successful attempt of quantum dots synthesis using plant extract. 81.07.Ta; 81.16.-c; 81.16.Rf.

View Article: PubMed Central - PubMed

Affiliation: Department of Genomics and Molecular Biotechnology, Institute of Food Biotechnology and Genomics, Natl. Acad. of Sci. of Ukraine, Osypovskogo Str., 2a, Kiev, 04123, Ukraine, marie0589@gmail.com.

ABSTRACT

Unlabelled: CdS nanoparticles have a great potential for application in chemical research, bioscience and medicine. The aim of this study was to develop an efficient and environmentally-friendly method of plant-based biosynthesis of CdS quantum dots using hairy root culture of Linaria maroccana L. By incubating Linaria root extract with inorganic cadmium sulfate and sodium sulfide we synthesized stable luminescent CdS nanocrystals with absorption peaks for UV-visible spectrometry at 362 nm, 398 nm and 464 nm, and luminescent peaks at 425, 462, 500 nm. Transmission electron microscopy of produced quantum dots revealed their spherical shape with a size predominantly from 5 to 7 nm. Electron diffraction pattern confirmed the wurtzite crystalline structure of synthesized cadmium sulfide quantum dots. These results describe the first successful attempt of quantum dots synthesis using plant extract.

Pacs: 81.07.Ta; 81.16.-c; 81.16.Rf.

No MeSH data available.


UV-Visible absorption spectrum of CdS nanoparticles. Only freshly prepared samples were used for the measurements. Cadmium sulfide quantum dots samples contained 2 ml of 0.025 М CdSO4 solution, 30 ml of a hairy root aqueous extract of L. maroccana and 500 μl of 0.5 М Na2S. A homogeneous clear solution of CdS nanoparticles with bright yellow color was formed after 4 day incubation at 28°C. Absorption spectrum contained three clear peaks corresponded to the wavelengths 362 nm, 398 nm and 464 nm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4493840&req=5

Fig4: UV-Visible absorption spectrum of CdS nanoparticles. Only freshly prepared samples were used for the measurements. Cadmium sulfide quantum dots samples contained 2 ml of 0.025 М CdSO4 solution, 30 ml of a hairy root aqueous extract of L. maroccana and 500 μl of 0.5 М Na2S. A homogeneous clear solution of CdS nanoparticles with bright yellow color was formed after 4 day incubation at 28°C. Absorption spectrum contained three clear peaks corresponded to the wavelengths 362 nm, 398 nm and 464 nm.

Mentions: Transmission electron microscopy analysis allowed to investigate the shape of produced CdS nanoparticles and their size distribution. For such measurements 0.5 mL of the colloidal solution of CdS nanoparticles was deposited onto carbon coated grids. Typical electron micrographs are represented in Figures 1 and 2.The particle size distribution histogram determined from TEM micrographs is shown in Figure 3. Total number of nanoparticles for particle size histogram is 305 ones per field of view. It was found that the average particle size was 5.5 – 6.9 nm as well as there was a large amount of nanoparticles with a diameter of 2–5 nm. The smallest size of quantum dots corresponded to 7–8.5 nm. In addition according to electron microscopy data, it was established that synthesized nanoparticles were elliptic or spherical in shape and did not have significant surface defects.The absorption spectrum of CdS nanoparticles demonstrated two clear maxima and plangent structure in the interval between these peaks (Figure 4). Total synthesized spectrum is shown in Figure 3 by dashed line. It was revealed that centers of absorption peaks corresponded to the wavelengths 362 nm, 398 nm and 464 nm.Figure 1


Biosynthesis of luminescent CdS quantum dots using plant hairy root culture.

Borovaya MN, Naumenko AP, Matvieieva NA, Blume YB, Yemets AI - Nanoscale Res Lett (2014)

UV-Visible absorption spectrum of CdS nanoparticles. Only freshly prepared samples were used for the measurements. Cadmium sulfide quantum dots samples contained 2 ml of 0.025 М CdSO4 solution, 30 ml of a hairy root aqueous extract of L. maroccana and 500 μl of 0.5 М Na2S. A homogeneous clear solution of CdS nanoparticles with bright yellow color was formed after 4 day incubation at 28°C. Absorption spectrum contained three clear peaks corresponded to the wavelengths 362 nm, 398 nm and 464 nm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493840&req=5

Fig4: UV-Visible absorption spectrum of CdS nanoparticles. Only freshly prepared samples were used for the measurements. Cadmium sulfide quantum dots samples contained 2 ml of 0.025 М CdSO4 solution, 30 ml of a hairy root aqueous extract of L. maroccana and 500 μl of 0.5 М Na2S. A homogeneous clear solution of CdS nanoparticles with bright yellow color was formed after 4 day incubation at 28°C. Absorption spectrum contained three clear peaks corresponded to the wavelengths 362 nm, 398 nm and 464 nm.
Mentions: Transmission electron microscopy analysis allowed to investigate the shape of produced CdS nanoparticles and their size distribution. For such measurements 0.5 mL of the colloidal solution of CdS nanoparticles was deposited onto carbon coated grids. Typical electron micrographs are represented in Figures 1 and 2.The particle size distribution histogram determined from TEM micrographs is shown in Figure 3. Total number of nanoparticles for particle size histogram is 305 ones per field of view. It was found that the average particle size was 5.5 – 6.9 nm as well as there was a large amount of nanoparticles with a diameter of 2–5 nm. The smallest size of quantum dots corresponded to 7–8.5 nm. In addition according to electron microscopy data, it was established that synthesized nanoparticles were elliptic or spherical in shape and did not have significant surface defects.The absorption spectrum of CdS nanoparticles demonstrated two clear maxima and plangent structure in the interval between these peaks (Figure 4). Total synthesized spectrum is shown in Figure 3 by dashed line. It was revealed that centers of absorption peaks corresponded to the wavelengths 362 nm, 398 nm and 464 nm.Figure 1

Bottom Line: Transmission electron microscopy of produced quantum dots revealed their spherical shape with a size predominantly from 5 to 7 nm.Electron diffraction pattern confirmed the wurtzite crystalline structure of synthesized cadmium sulfide quantum dots.These results describe the first successful attempt of quantum dots synthesis using plant extract. 81.07.Ta; 81.16.-c; 81.16.Rf.

View Article: PubMed Central - PubMed

Affiliation: Department of Genomics and Molecular Biotechnology, Institute of Food Biotechnology and Genomics, Natl. Acad. of Sci. of Ukraine, Osypovskogo Str., 2a, Kiev, 04123, Ukraine, marie0589@gmail.com.

ABSTRACT

Unlabelled: CdS nanoparticles have a great potential for application in chemical research, bioscience and medicine. The aim of this study was to develop an efficient and environmentally-friendly method of plant-based biosynthesis of CdS quantum dots using hairy root culture of Linaria maroccana L. By incubating Linaria root extract with inorganic cadmium sulfate and sodium sulfide we synthesized stable luminescent CdS nanocrystals with absorption peaks for UV-visible spectrometry at 362 nm, 398 nm and 464 nm, and luminescent peaks at 425, 462, 500 nm. Transmission electron microscopy of produced quantum dots revealed their spherical shape with a size predominantly from 5 to 7 nm. Electron diffraction pattern confirmed the wurtzite crystalline structure of synthesized cadmium sulfide quantum dots. These results describe the first successful attempt of quantum dots synthesis using plant extract.

Pacs: 81.07.Ta; 81.16.-c; 81.16.Rf.

No MeSH data available.