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Patterning two-dimensional free-standing surfaces with mesoporous conducting polymers.

Liu S, Gordiichuk P, Wu ZS, Liu Z, Wei W, Wagner M, Mohamed-Noriega N, Wu D, Mai Y, Herrmann A, Müllen K, Feng X - Nat Commun (2015)

Bottom Line: Although two-dimensional surfaces can serve as attractive platforms, direct patterning them in solution with regular arrays remains a major challenge.This strategy allows for bottom-up patterning of polypyrrole and polyaniline with adjustable mesopores on various functional free-standing surfaces, including two-dimensional graphene, molybdenum sulfide, titania nanosheets and even on one-dimensional carbon nanotubes.As exemplified by graphene oxide-based mesoporous polypyrrole nanosheets, the unique sandwich structure with adjustable pore sizes (5-20 nm) and thickness (35-45 nm) as well as enlarged specific surface area (85 m(2) g(-1)) provides excellent specific capacitance and rate performance for supercapacitors.

View Article: PubMed Central - PubMed

Affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240 Shanghai, China.

ABSTRACT
The ability to pattern functional moieties with well-defined architectures is highly important in material science, nanotechnology and bioengineering. Although two-dimensional surfaces can serve as attractive platforms, direct patterning them in solution with regular arrays remains a major challenge. Here we develop a versatile route to pattern two-dimensional free-standing surfaces in a controlled manner assisted by monomicelle close-packing assembly of block copolymers, which is unambiguously revealed by direct visual observation. This strategy allows for bottom-up patterning of polypyrrole and polyaniline with adjustable mesopores on various functional free-standing surfaces, including two-dimensional graphene, molybdenum sulfide, titania nanosheets and even on one-dimensional carbon nanotubes. As exemplified by graphene oxide-based mesoporous polypyrrole nanosheets, the unique sandwich structure with adjustable pore sizes (5-20 nm) and thickness (35-45 nm) as well as enlarged specific surface area (85 m(2) g(-1)) provides excellent specific capacitance and rate performance for supercapacitors. Therefore, this approach will shed light on developing solution-based soft patterning of given interfaces towards bespoke functions.

No MeSH data available.


Related in: MedlinePlus

Patterning of 2D free-standing surfaces with controlled mesopores.(a) SEM image (a-1) and TEM image (a-2) of mPPy@GO-1 nanosheets. (b) SEM image (b-1) and TEM image (b-2) of mPPy@GO-2 nanosheets. (c) N2 adsorption/desorption isotherms of (c-1) mPPy@GO nanosheets (black: mPPy@GO-1, red: mPPy@GO-2 and blue: mPPy@GO-3), where the red and blue isotherms are vertically offset by 75 and 250 cm3 g−1 STP, respectively. (c-2) The pore size distribution curves calculated from the adsorption branches (scale bar, 100 nm).
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f3: Patterning of 2D free-standing surfaces with controlled mesopores.(a) SEM image (a-1) and TEM image (a-2) of mPPy@GO-1 nanosheets. (b) SEM image (b-1) and TEM image (b-2) of mPPy@GO-2 nanosheets. (c) N2 adsorption/desorption isotherms of (c-1) mPPy@GO nanosheets (black: mPPy@GO-1, red: mPPy@GO-2 and blue: mPPy@GO-3), where the red and blue isotherms are vertically offset by 75 and 250 cm3 g−1 STP, respectively. (c-2) The pore size distribution curves calculated from the adsorption branches (scale bar, 100 nm).

Mentions: By simply changing the PS block lengths, the patterning of conducting polymers on 2D free-standing surfaces with various pore sizes and thickness can be realized. When using the PS38-b-PEO114 template with a shorter PS block, the pore size decreases to below 6 nm with the thickness of ∼35 nm (Fig. 3a; Supplementary Fig. 9). When the PS block length is increased to a degree of polymerization of 146, the pore size of mPPy@GO-3 nanosheets increased to ∼20 nm (Fig. 3b) and the thickness increased to ∼44 nm. In addition, the pore–pore distance of mPPy@GO-1 nanosheets is ∼13.5 nm, while that of mPPy@GO-3 nanosheets is ∼17.4 nm, indicating that the pore–pore distances of mPPy@GO are more dependent on the hydrophilic PEO length than on the size of the PS block.


Patterning two-dimensional free-standing surfaces with mesoporous conducting polymers.

Liu S, Gordiichuk P, Wu ZS, Liu Z, Wei W, Wagner M, Mohamed-Noriega N, Wu D, Mai Y, Herrmann A, Müllen K, Feng X - Nat Commun (2015)

Patterning of 2D free-standing surfaces with controlled mesopores.(a) SEM image (a-1) and TEM image (a-2) of mPPy@GO-1 nanosheets. (b) SEM image (b-1) and TEM image (b-2) of mPPy@GO-2 nanosheets. (c) N2 adsorption/desorption isotherms of (c-1) mPPy@GO nanosheets (black: mPPy@GO-1, red: mPPy@GO-2 and blue: mPPy@GO-3), where the red and blue isotherms are vertically offset by 75 and 250 cm3 g−1 STP, respectively. (c-2) The pore size distribution curves calculated from the adsorption branches (scale bar, 100 nm).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4660032&req=5

f3: Patterning of 2D free-standing surfaces with controlled mesopores.(a) SEM image (a-1) and TEM image (a-2) of mPPy@GO-1 nanosheets. (b) SEM image (b-1) and TEM image (b-2) of mPPy@GO-2 nanosheets. (c) N2 adsorption/desorption isotherms of (c-1) mPPy@GO nanosheets (black: mPPy@GO-1, red: mPPy@GO-2 and blue: mPPy@GO-3), where the red and blue isotherms are vertically offset by 75 and 250 cm3 g−1 STP, respectively. (c-2) The pore size distribution curves calculated from the adsorption branches (scale bar, 100 nm).
Mentions: By simply changing the PS block lengths, the patterning of conducting polymers on 2D free-standing surfaces with various pore sizes and thickness can be realized. When using the PS38-b-PEO114 template with a shorter PS block, the pore size decreases to below 6 nm with the thickness of ∼35 nm (Fig. 3a; Supplementary Fig. 9). When the PS block length is increased to a degree of polymerization of 146, the pore size of mPPy@GO-3 nanosheets increased to ∼20 nm (Fig. 3b) and the thickness increased to ∼44 nm. In addition, the pore–pore distance of mPPy@GO-1 nanosheets is ∼13.5 nm, while that of mPPy@GO-3 nanosheets is ∼17.4 nm, indicating that the pore–pore distances of mPPy@GO are more dependent on the hydrophilic PEO length than on the size of the PS block.

Bottom Line: Although two-dimensional surfaces can serve as attractive platforms, direct patterning them in solution with regular arrays remains a major challenge.This strategy allows for bottom-up patterning of polypyrrole and polyaniline with adjustable mesopores on various functional free-standing surfaces, including two-dimensional graphene, molybdenum sulfide, titania nanosheets and even on one-dimensional carbon nanotubes.As exemplified by graphene oxide-based mesoporous polypyrrole nanosheets, the unique sandwich structure with adjustable pore sizes (5-20 nm) and thickness (35-45 nm) as well as enlarged specific surface area (85 m(2) g(-1)) provides excellent specific capacitance and rate performance for supercapacitors.

View Article: PubMed Central - PubMed

Affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240 Shanghai, China.

ABSTRACT
The ability to pattern functional moieties with well-defined architectures is highly important in material science, nanotechnology and bioengineering. Although two-dimensional surfaces can serve as attractive platforms, direct patterning them in solution with regular arrays remains a major challenge. Here we develop a versatile route to pattern two-dimensional free-standing surfaces in a controlled manner assisted by monomicelle close-packing assembly of block copolymers, which is unambiguously revealed by direct visual observation. This strategy allows for bottom-up patterning of polypyrrole and polyaniline with adjustable mesopores on various functional free-standing surfaces, including two-dimensional graphene, molybdenum sulfide, titania nanosheets and even on one-dimensional carbon nanotubes. As exemplified by graphene oxide-based mesoporous polypyrrole nanosheets, the unique sandwich structure with adjustable pore sizes (5-20 nm) and thickness (35-45 nm) as well as enlarged specific surface area (85 m(2) g(-1)) provides excellent specific capacitance and rate performance for supercapacitors. Therefore, this approach will shed light on developing solution-based soft patterning of given interfaces towards bespoke functions.

No MeSH data available.


Related in: MedlinePlus