scholarly journals Directional self-assembly of gold nanorods into 1D and 2D arrays by quadruple hydrogen bonding

2019 ◽  
Vol 3 (9) ◽  
pp. 1888-1891
Author(s):  
Mingming Zhai ◽  
Qiang Chen ◽  
Wei Yuan ◽  
Qixun Shi ◽  
Hui Xu
Keyword(s):  
Hydrogen Bonding ◽  
Gold Nanorods ◽  
Self Assembly ◽  
Bottom Up ◽  
Assembly Strategy ◽  
2D Arrays ◽  
Quadruple Hydrogen Bonding

We developed a facile, bottom-up self-assembly strategy of gold nanorods via quadruple hydrogen bonding.

scholarly journals Quadruple Hydrogen Bond-Containing A-AB-A Triblock Copolymers: Probing the Influence of Hydrogen Bonding in the Central Block

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4705
Author(s):  
Boer Liu ◽  
Xi Chen ◽  
Glenn A. Spiering ◽  
Robert B. Moore ◽  
Timothy E. Long
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Microphase Separation ◽  
Triblock Copolymers ◽  
Random Copolymer ◽  
Thermomechanical Properties ◽  
Structure Property ◽  
Scanning Calorimetry ◽  
Central Block ◽  
Quadruple Hydrogen Bonding

This work reveals the influence of pendant hydrogen bonding strength and distribution on self-assembly and the resulting thermomechanical properties of A-AB-A triblock copolymers. Reversible addition-fragmentation chain transfer polymerization afforded a library of A-AB-A acrylic triblock copolymers, wherein the A unit contained cytosine acrylate (CyA) or post-functionalized ureido cytosine acrylate (UCyA) and the B unit consisted of n-butyl acrylate (nBA). Differential scanning calorimetry revealed two glass transition temperatures, suggesting microphase-separation in the A-AB-A triblock copolymers. Thermomechanical and morphological analysis revealed the effects of hydrogen bonding distribution and strength on the self-assembly and microphase-separated morphology. Dynamic mechanical analysis showed multiple tan delta (δ) transitions that correlated to chain relaxation and hydrogen bonding dissociation, further confirming the microphase-separated structure. In addition, UCyA triblock copolymers possessed an extended modulus plateau versus temperature compared to the CyA analogs due to the stronger association of quadruple hydrogen bonding. CyA triblock copolymers exhibited a cylindrical microphase-separated morphology according to small-angle X-ray scattering. In contrast, UCyA triblock copolymers lacked long-range ordering due to hydrogen bonding induced phase mixing. The incorporation of UCyA into the soft central block resulted in improved tensile strength, extensibility, and toughness compared to the AB random copolymer and A-B-A triblock copolymer comparisons. This study provides insight into the structure-property relationships of A-AB-A supramolecular triblock copolymers that result from tunable association strengths.

A versatile bottom-up interface self-assembly strategy to hairy nanoparticle-based 2D monolayered composite and functional nanosheets

2019 ◽  
Vol 55 (69) ◽  
pp. 10241-10244 ◽  
Author(s):  
Weicong Mai ◽  
Yuan Zuo ◽  
Xingcai Zhang ◽  
Kunyi Leng ◽  
Ruliang Liu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Bottom Up ◽  
Assembly Strategy

A universal bottom-up interface self-assembly strategy for fabricating hairy nanoparticle-based 2D monolayered composite and functional nanosheets was presented.

Twin-Tapered Molecules Containing Bi-dihydrazine Units:  Self-Assembly through Intermolecular Quadruple Hydrogen Bonding and Liquid Crystalline Behavior

2007 ◽  
Vol 19 (20) ◽  
pp. 4839-4846 ◽  
Author(s):  
Songnan Qu ◽  
Fan Li ◽  
Haitao Wang ◽  
Binglian Bai ◽  
Chunyan Xu ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
Quadruple Hydrogen Bonding
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