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Metal phthalocyanine: fullerene composite nanotubes via templating method for enhanced properties.

Ahmad Makinudin AH, Fakir MS, Supangat A - Nanoscale Res Lett (2015)

Bottom Line: VOPcPhO:PC71BM composite nanotubes showed the significant properties improvement if compared over their bulk heterojunction counterpart.Significant quenching has been attained by the photoluminescence spectra of VOPcPhO:PC71BM composite nanotubes which supports the redshift of UV-vis absorption spectra.Presumably, the photo-induced charge transfer and charge carrier dissociation can be enhanced from the VOPcPhO:PC71BM composite nanotubes rather than the bulk heterojunction.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, Low Dimensional Materials Research Centre, University of Malaya, Kuala Lumpur, 50603 Malaysia.

ABSTRACT
The use of templating method to synthesize the vanadyl 2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine (VOPcPhO):[6,6]-phenyl C71 butyric acid methyl ester (PC71BM) composite nanotubes is presented here. VOPcPhO is a p-type material and PC71BM is an n-type material which acts as an electron donor and electron acceptor, respectively. Both materials have been studied due to their potential applications as solar energy converter and organic electronics. High-resolution transmission electron microscope (HRTEM) and field emission scanning electron microscope (FESEM) images have shown the replication of the porous template diameter of approximately 200 nm with a superior incorporation of both VOPcPhO and PC71BM. VOPcPhO:PC71BM composite nanotubes showed the significant properties improvement if compared over their bulk heterojunction counterpart. UV-vis spectra of composite nanotubes show a shift to a longer wavelength at the absorption peaks. Significant quenching has been attained by the photoluminescence spectra of VOPcPhO:PC71BM composite nanotubes which supports the redshift of UV-vis absorption spectra. Presumably, the photo-induced charge transfer and charge carrier dissociation can be enhanced from the VOPcPhO:PC71BM composite nanotubes rather than the bulk heterojunction.

No MeSH data available.


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Schematic illustrations on the formation of VOPcPhO nanotubes (a) and VOPcPhO:PC71BM composite nanotubes (b).
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Fig4: Schematic illustrations on the formation of VOPcPhO nanotubes (a) and VOPcPhO:PC71BM composite nanotubes (b).

Mentions: Schematic illustration of the proposed formation of VOPcPhO nanotubes and VOPcPhO:PC71BM composite nanotubes is depicted in Figure 4a,b, respectively. As shown in Figure 4a, the alumina template was first cleaned (i) prior to 24 h of immersion (ii). After 24 h of immersion, the sample was directly annealed at 150°C for 1 min. In order to ease the FESEM characterization process, sample was stuck upside down on copper tape due to the high conductive properties of the tape. The stuck sample was dissolved in NaOH for 12 h to remove the template (iii). Wetting and surface tension properties hold by VOPcPhO solution and template have steered to the formation of VOPcPhO nanotubes (iv). The immersion process has sanctioned the spreading of solution over the template's wall by creating an approximately 20 nm of wall thickness. The formation of VOPcPhO: PC71BM composite nanotubes are shown in Figure 4b. The first two steps (Figure 4b(i,ii)) were similar to that in Figure 4a(i,ii). Before further infiltration of PC71BM into the VOPcPhO nanotubes via spin coating technique (iii), the existing sample was thermally annealed. The main reason of using spin coating as a technique to infiltrate the PC71BM is due to the use of the chloroform as a solvent. Since the VOPcPhO is also soluble in chloroform, second immersion of VOPcPhO (template) into the PC71BM solution will only eradicate the initial nanotube wall created by VOPcPhO. Consequently, PC71BM nanotubes will be formed rather than the VOPcPhO: PC71BM composite nanotubes. In contrast, implementing the spin coating for the PC71BM infiltration could herald to the formation of composite nanotubes (iv). The sample will then be glued onto the copper tape prior to 12 h of template dissolution (v). The end product of VOPcPhO: PC71BM composite nanotubes is created (vi) due to the compatible wetting properties preserved between VOPcPhO nanotubes (surface) and PC71BM (solution) during the infiltration.Figure 4


Metal phthalocyanine: fullerene composite nanotubes via templating method for enhanced properties.

Ahmad Makinudin AH, Fakir MS, Supangat A - Nanoscale Res Lett (2015)

Schematic illustrations on the formation of VOPcPhO nanotubes (a) and VOPcPhO:PC71BM composite nanotubes (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4384975&req=5

Fig4: Schematic illustrations on the formation of VOPcPhO nanotubes (a) and VOPcPhO:PC71BM composite nanotubes (b).
Mentions: Schematic illustration of the proposed formation of VOPcPhO nanotubes and VOPcPhO:PC71BM composite nanotubes is depicted in Figure 4a,b, respectively. As shown in Figure 4a, the alumina template was first cleaned (i) prior to 24 h of immersion (ii). After 24 h of immersion, the sample was directly annealed at 150°C for 1 min. In order to ease the FESEM characterization process, sample was stuck upside down on copper tape due to the high conductive properties of the tape. The stuck sample was dissolved in NaOH for 12 h to remove the template (iii). Wetting and surface tension properties hold by VOPcPhO solution and template have steered to the formation of VOPcPhO nanotubes (iv). The immersion process has sanctioned the spreading of solution over the template's wall by creating an approximately 20 nm of wall thickness. The formation of VOPcPhO: PC71BM composite nanotubes are shown in Figure 4b. The first two steps (Figure 4b(i,ii)) were similar to that in Figure 4a(i,ii). Before further infiltration of PC71BM into the VOPcPhO nanotubes via spin coating technique (iii), the existing sample was thermally annealed. The main reason of using spin coating as a technique to infiltrate the PC71BM is due to the use of the chloroform as a solvent. Since the VOPcPhO is also soluble in chloroform, second immersion of VOPcPhO (template) into the PC71BM solution will only eradicate the initial nanotube wall created by VOPcPhO. Consequently, PC71BM nanotubes will be formed rather than the VOPcPhO: PC71BM composite nanotubes. In contrast, implementing the spin coating for the PC71BM infiltration could herald to the formation of composite nanotubes (iv). The sample will then be glued onto the copper tape prior to 12 h of template dissolution (v). The end product of VOPcPhO: PC71BM composite nanotubes is created (vi) due to the compatible wetting properties preserved between VOPcPhO nanotubes (surface) and PC71BM (solution) during the infiltration.Figure 4

Bottom Line: VOPcPhO:PC71BM composite nanotubes showed the significant properties improvement if compared over their bulk heterojunction counterpart.Significant quenching has been attained by the photoluminescence spectra of VOPcPhO:PC71BM composite nanotubes which supports the redshift of UV-vis absorption spectra.Presumably, the photo-induced charge transfer and charge carrier dissociation can be enhanced from the VOPcPhO:PC71BM composite nanotubes rather than the bulk heterojunction.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, Low Dimensional Materials Research Centre, University of Malaya, Kuala Lumpur, 50603 Malaysia.

ABSTRACT
The use of templating method to synthesize the vanadyl 2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine (VOPcPhO):[6,6]-phenyl C71 butyric acid methyl ester (PC71BM) composite nanotubes is presented here. VOPcPhO is a p-type material and PC71BM is an n-type material which acts as an electron donor and electron acceptor, respectively. Both materials have been studied due to their potential applications as solar energy converter and organic electronics. High-resolution transmission electron microscope (HRTEM) and field emission scanning electron microscope (FESEM) images have shown the replication of the porous template diameter of approximately 200 nm with a superior incorporation of both VOPcPhO and PC71BM. VOPcPhO:PC71BM composite nanotubes showed the significant properties improvement if compared over their bulk heterojunction counterpart. UV-vis spectra of composite nanotubes show a shift to a longer wavelength at the absorption peaks. Significant quenching has been attained by the photoluminescence spectra of VOPcPhO:PC71BM composite nanotubes which supports the redshift of UV-vis absorption spectra. Presumably, the photo-induced charge transfer and charge carrier dissociation can be enhanced from the VOPcPhO:PC71BM composite nanotubes rather than the bulk heterojunction.

No MeSH data available.


Related in: MedlinePlus