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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 various functional free-standing surfaces.(a-1) Structure of MoS2 nanosheets in top view (upper) and side view (lower). (a-2) SEM image of large-pore mesoporous PPy nanosheets on MoS2 nanosheets. (b-1) Structure of titania nanosheets in the [010] (upper) and [001] (lower) directions. (b-2) SEM image of large-pore mesoporous PPy nanosheets on titania nanosheets. (c-1) Illustration of the 1-PSA-modified EG surfaces. (c-2) SEM image of large-pore mesoporous PPy nanosheets on EG nanosheets following modification with 1-PSA. (d-1) Illustration of CNTs wrapped by PS-b-PEO micelles. (d-2) SEM image of large-pore mesoporous PPy nanosheets on CNTs (inset of d is TEM image; scale bar: 100 nm).
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f4: Patterning of various functional free-standing surfaces.(a-1) Structure of MoS2 nanosheets in top view (upper) and side view (lower). (a-2) SEM image of large-pore mesoporous PPy nanosheets on MoS2 nanosheets. (b-1) Structure of titania nanosheets in the [010] (upper) and [001] (lower) directions. (b-2) SEM image of large-pore mesoporous PPy nanosheets on titania nanosheets. (c-1) Illustration of the 1-PSA-modified EG surfaces. (c-2) SEM image of large-pore mesoporous PPy nanosheets on EG nanosheets following modification with 1-PSA. (d-1) Illustration of CNTs wrapped by PS-b-PEO micelles. (d-2) SEM image of large-pore mesoporous PPy nanosheets on CNTs (inset of d is TEM image; scale bar: 100 nm).

Mentions: This BCP-directed approach can be further adapted for the direct patterning of mesoporous conducting polymers on other functional surfaces. Taking the 2D free-standing nanosheets of MoS2, titania and electrochemically EG as examples, a series of mesoporous conducting nanosheets with similar sandwich structures can be obtained. Figure 4a shows the large-pore mesoporous structures and sandwich morphologies that result from patterning PPy on the surface of ultrathin MoS2, which was exfoliated using the lithium ion intercalation method39. Similarly, using ultrathin titania as the 2D free-standing surface and PS102-b-PEO114 as the template, titania-based mesoporous PPy nanosheets with regular pore arrays and large pore sizes of ∼12 nm can also be obtained (Fig. 4b). Similar to the GO system, BCP micelles can be also effectively adsorbed onto both surfaces of MoS2 and titania nanosheets via H-bonding interaction (Supplementary Fig. 3), which further guides the confined adsorption of pyrrole monomers onto the negatively charged surfaces of MoS2 and titania, and results into the successful patterning of PPy in 2D manner.


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 various functional free-standing surfaces.(a-1) Structure of MoS2 nanosheets in top view (upper) and side view (lower). (a-2) SEM image of large-pore mesoporous PPy nanosheets on MoS2 nanosheets. (b-1) Structure of titania nanosheets in the [010] (upper) and [001] (lower) directions. (b-2) SEM image of large-pore mesoporous PPy nanosheets on titania nanosheets. (c-1) Illustration of the 1-PSA-modified EG surfaces. (c-2) SEM image of large-pore mesoporous PPy nanosheets on EG nanosheets following modification with 1-PSA. (d-1) Illustration of CNTs wrapped by PS-b-PEO micelles. (d-2) SEM image of large-pore mesoporous PPy nanosheets on CNTs (inset of d is TEM image; scale bar: 100 nm).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f4: Patterning of various functional free-standing surfaces.(a-1) Structure of MoS2 nanosheets in top view (upper) and side view (lower). (a-2) SEM image of large-pore mesoporous PPy nanosheets on MoS2 nanosheets. (b-1) Structure of titania nanosheets in the [010] (upper) and [001] (lower) directions. (b-2) SEM image of large-pore mesoporous PPy nanosheets on titania nanosheets. (c-1) Illustration of the 1-PSA-modified EG surfaces. (c-2) SEM image of large-pore mesoporous PPy nanosheets on EG nanosheets following modification with 1-PSA. (d-1) Illustration of CNTs wrapped by PS-b-PEO micelles. (d-2) SEM image of large-pore mesoporous PPy nanosheets on CNTs (inset of d is TEM image; scale bar: 100 nm).
Mentions: This BCP-directed approach can be further adapted for the direct patterning of mesoporous conducting polymers on other functional surfaces. Taking the 2D free-standing nanosheets of MoS2, titania and electrochemically EG as examples, a series of mesoporous conducting nanosheets with similar sandwich structures can be obtained. Figure 4a shows the large-pore mesoporous structures and sandwich morphologies that result from patterning PPy on the surface of ultrathin MoS2, which was exfoliated using the lithium ion intercalation method39. Similarly, using ultrathin titania as the 2D free-standing surface and PS102-b-PEO114 as the template, titania-based mesoporous PPy nanosheets with regular pore arrays and large pore sizes of ∼12 nm can also be obtained (Fig. 4b). Similar to the GO system, BCP micelles can be also effectively adsorbed onto both surfaces of MoS2 and titania nanosheets via H-bonding interaction (Supplementary Fig. 3), which further guides the confined adsorption of pyrrole monomers onto the negatively charged surfaces of MoS2 and titania, and results into the successful patterning of PPy in 2D manner.

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