Tang, Qiyun

[["dc.bibliographiccitation.firstpage","2004922"],["dc.bibliographiccitation.issue","44"],["dc.bibliographiccitation.journal","Small"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Liu, Huan"],["dc.contributor.author","Pang, Bo"],["dc.contributor.author","Tang, Qiyun"],["dc.contributor.author","Müller, Marcus"],["dc.contributor.author","Zhang, Hua"],["dc.contributor.author","Dervişoğlu, Riza"],["dc.contributor.author","Zhang, Kai"],["dc.date.accessioned","2021-04-14T08:32:17Z"],["dc.date.available","2021-04-14T08:32:17Z"],["dc.date.issued","2020"],["dc.description.abstract","Abstract For the first time Janus‐like films of surface‐acylated cellulose nanowhiskers (CNWs) with or without graphene oxide (GO) via one‐step evaporation‐driven self‐assembly process are reported, which have reconstructible time‐dependent micro‐/nanostructures and asymmetric wettability. The heterogeneous aggregation of CNWs on rough Teflon substrates favors the formation of uniform films, leading to hydrophobic smooth bottom surface. The homogeneous nucleation of residual CNWs in bulk suspensions promotes the growth of patchy microspheres with an average diameter of 22.7 ± 2.1 µm, which precipitate on the top surface leading to enhanced hydrophobicity. These patchy microspheres are thermoresponsive and vanish after heating at 60 °C within 1 min, while they are reconstructed at room temperature with time‐dependent evolving micro‐/nanostructures in dry state within 2 d. The thermoresponsive transition of patchy microparticles leads to accompanied switchable change between transparency and opacity of Janus‐like films. Furthermore, the incorporation of GO generates more patchy microspheres with an average diameter of 13.5 ± 1.3 µm on the top surface of hybrid Janus‐like films. Different distributions of CNWs and GO in Janus‐like films and the solvent‐responsive self‐assembled patchy microparticles of CNWs facilitate their reversible actuation by showing fast curling in THF within 6 s and flattening in water for at least 25 cycles."],["dc.description.abstract","Janus‐like films of self‐assembled surface‐acylated cellulose nanowhiskers (CNWs) with or without graphene oxide (GO) have asymmetric topographies on their top and bottom surfaces showing different wettabilities, allowing fast solvent‐responsive actuation. Self‐assembled patchy microspheres on the top surface vanish upon heating and recover after cooling down to room temperature with time‐dependent morphologies, while the bottom surface remains smooth. image"],["dc.description.sponsorship","German Research Foundation http://dx.doi.org/10.13039/501100001659"],["dc.description.sponsorship","Georg‐August‐University of Goettingen"],["dc.description.sponsorship","China Scholarship Council http://dx.doi.org/10.13039/501100004543"],["dc.identifier.doi","10.1002/smll.202004922"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83873"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1613-6829"],["dc.relation.issn","1613-6810"],["dc.rights","This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes."],["dc.title","Self‐Assembly of Surface‐Acylated Cellulose Nanowhiskers and Graphene Oxide for Multiresponsive Janus‐Like Films with Time‐Dependent Dry‐State Structures"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2070241"],["dc.bibliographiccitation.issue","44"],["dc.bibliographiccitation.journal","Small"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Liu, Huan"],["dc.contributor.author","Pang, Bo"],["dc.contributor.author","Tang, Qiyun"],["dc.contributor.author","Müller, Marcus"],["dc.contributor.author","Zhang, Hua"],["dc.contributor.author","Dervişoğlu, Riza"],["dc.contributor.author","Zhang, Kai"],["dc.date.accessioned","2021-12-08T12:27:17Z"],["dc.date.available","2021-12-08T12:27:17Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1002/smll.202070241"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/95307"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-476"],["dc.relation.eissn","1613-6829"],["dc.relation.issn","1613-6810"],["dc.title","Multiresponsive Janus‐Like Films: Self‐Assembly of Surface‐Acylated Cellulose Nanowhiskers and Graphene Oxide for Multiresponsive Janus‐Like Films with Time‐Dependent Dry‐State Structures (Small 44/2020)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2102938"],["dc.bibliographiccitation.issue","38"],["dc.bibliographiccitation.journal","Small"],["dc.bibliographiccitation.volume","17"],["dc.contributor.affiliation","Yao, Yawen; 1\r\nSustainable Materials and Chemistry\r\nDepartment of Wood Technology and Wood‐Based Composites\r\nGeorg‐August‐University of Göttingen\r\nBüsgenweg 4 37077 Göttingen Germany"],["dc.contributor.affiliation","Tang, Qiyun; 2\r\nSchool of Physics\r\nSoutheast University\r\nNanjng 211189 China"],["dc.contributor.affiliation","Rosenfeldt, Sabine; 3\r\nDepartment of Chemistry and Bavarian Polymer Institute\r\nUniversity of Bayreuth\r\nUniversitätsstraße 30 95447 Bayreuth Germany"],["dc.contributor.affiliation","Krüsmann, Marcel; 4\r\nInstitute of Physical Chemistry I: Colloids and Nanooptics\r\nHeinrich Heine University\r\nUniversitätsstr.1 40225 Düsseldorf Germany"],["dc.contributor.affiliation","Karg, Matthias; 4\r\nInstitute of Physical Chemistry I: Colloids and Nanooptics\r\nHeinrich Heine University\r\nUniversitätsstr.1 40225 Düsseldorf Germany"],["dc.contributor.author","Yao, Yawen"],["dc.contributor.author","Tang, Qiyun"],["dc.contributor.author","Rosenfeldt, Sabine"],["dc.contributor.author","Krüsmann, Marcel"],["dc.contributor.author","Karg, Matthias"],["dc.contributor.author","Zhang, Kai"],["dc.date.accessioned","2021-09-01T06:42:46Z"],["dc.date.available","2021-09-01T06:42:46Z"],["dc.date.issued","2021"],["dc.date.updated","2022-03-20T23:20:43Z"],["dc.description.abstract","Abstract Unique supermolecular structures as chiral and flower‐like microparticles and the precise tuning of the morphologies hold immense promise for a variety of applications. Examples of such structures deriving from monosaccharides are still rare, and a general understanding is also lacking. Herein, it is shown that chiral, flower‐like, or solid microparticles can be tuned by only using monosaccharide esters without external stimuli. Chiral “left‐handed” (counterclockwise) and “right‐handed” (clockwise) morphologies can be induced by d‐ and l‐glucose stearoyl esters. In comparison, other monosaccharides, i.e., galactose, mannose, and xylose, cannot formed chiral particles and generated diverse other morphologies of the supermolecular microparticles based on their distinct molecular configurations. Due to the numbers of side chains and the bond orientations, microparticles with solid and porous flower‐like morphologies can be obtained. While glucose and xylose esters only lead to solid microparticles, mannose and galactose generate porous flower‐like particles. These findings suggest a general method to design and control the superstructures by using monosaccharide backbones with diverse molecular configurations."],["dc.description.abstract","Supermolecular structures including chiral and flower‐like microparticles can be obtained from stearoyl esters of monosaccharides with distinct bond configurations within sugar rings. Chiral “left‐handed” (counterclockwise) and “right‐handed” (clockwise) morphologies can be induced by d‐ and l‐glucose esters. Galactose and mannose backbones can generate flower‐like microparticles, while xylose ester can only form solid microparticles. image"],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659"],["dc.description.sponsorship","China Scholarship Council http://dx.doi.org/10.13039/501100004543"],["dc.identifier.doi","10.1002/smll.202102938"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89141"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-455"],["dc.relation.eissn","1613-6829"],["dc.relation.issn","1613-6810"],["dc.rights","This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes."],["dc.title","Tuning Sugar‐Based Chiral and Flower‐Like Microparticles"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]