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Top 10 most beautiful nanomaterials of 2019

Time:2020/01/07 丨 source:未知 丨 visit count:

Top 10 most beautiful nanomaterials of 2019

 
The 2019 annual material beauty pageant kicked off in December in China. The nano-materials who learned the news have to leave the laboratory to register for the competition. From blowing snows to golden Sands, from highlands and mountains to the rivers and seas, nanomaterials travel day and night. In the end, ten new nanomaterials stars emerged as the most beautiful nanomaterials of 2019. Let's welcome them!
 
1. "nano-kites" from Professor Zhang Hua's team glided down to the venue in a gentle breeze from the South Ocean. 



The Au nano-kite has an unusual twin 4H phase structure and {1012} or {1016} twin planes with non-dense packing. Professor Zhang Hua (City University of Hong Kong) and Mr. Niu Wenxin Fly nano-kites into the blue sky of scientific research. Professor Zhang Hua, who works on the nanoscale phase engineering (PENs) , is like Ma Liang with magic pen of the nanoscale world, using PENs to paint the beauty of nanomaterials. 《Unusual 4H-phase twinned noble metal nanokites》。Nature Commun., 2019,10,2881。

2. The C18 ring is the most beautiful octagon in the world of materials, as a new member of the prominent carbon family is welcomed. 


The new carbon allotropy, C18 , has a pure sp hybrid ring with a single triple bond arranged end to end. Its configuration is octagonal and very nearly circular. Przemyslaw Gawe and Harry L. Anderson’s team in University of Oxford teamed up with Leo Gross's team at IBM in Switzerland to put the samples into a high vacuum chamber with a single layer of sodium chloride. They scan tunneling microscope and atomic force microscope, They modulate the probe's microcurrents and microvoltages to stimulate the ionization of the carbonyl group and the ring opening of the quaternary ring, The clear image of C18 carbon ring was captured by micro-imaging, which is a new addition to the carbon family. 《An sp-hybridized molecular carbon allotrope, cyclo[18]carbon》。Science,2019,365, 1299。
 
3. Ru scatters, PtCu split the “ clouds of water”


Li Yadong, academician of Tsinghua University, Yu-en Wu, and Professor Li Weixue of the Chinese University of Science and Technology, are brilliant at spreading single-atom Ru on the pentagonal twin nanowires of PtCu, which have been grown into dentate islands of PtCu. After cleaning with nitric acid, the material has a hollow structure and a platinum-rich surface, and is stable under acidic conditions. The material exhibits excellent activity and stability of acidic oxygen precipitation (OER) . 《Engineering the electronic structure of single atom Ru sites via compressive strain boosts acidic water oxidation electrocatalysis》。 Nature Catalysis, 2019, 2, 304。

 4. DNA-encoded nano-self-assembly materials, Magic!


 
Professor Yossi Weizmann and Gang Chen, of the University of Chicago in the US, have used diblock copolymers (polystyrene-b-Polyacrylic acid) to selectively block the surface of nanoparticles. By adjusting the interfacial free energy of the ternary system of nanoparticles, solvents and Copolymers, the controllable accessibility of the surface of nanoparticles was obtained. Regioselectivity and programmable surface coding can be achieved by modifying polymer free surface regions with single strand DNA. The resultant binding potential between the particles is selective and directional, thus increasing the potential complexity of self-assembly. Using the versatility of the Regioselectivity surface coding strategy, the authors fabricated a variety of nanoparticles in isotropic or anisotropic shapes, creating a total of 24 different complex and elegant nanoassemblies. 《Regioselective surface encoding of nanoparticles for programmable self-assembly》。Nature Materials, 2019, 18, 169。
 

5. WSe2 / WS2 molar superlattices and molar excitons with rotation angle close to zero degree
 


Professor Feng Wang's team at the University of California, Berkeley, constructed a two dimensional Johannes Diderik van der Waals Heterojunction WSe2 / WS2. We have observed the molar superlattice exciton states in the Tungsten Tungsten disulfide diselenide (WSe2 / WS2) heterostructure. These mole exciton states exhibit multiple peaks near the resonance of the original WSe2 A Exciton in the Absorption Spectra, and they exhibit gate dependence different from the a exciton in the WSe2 monolayer and WSe2 / WS2 heterostructure with large twist angle. These phenomena can be described by a theoretical model, in which the periodic molar potential is much stronger than the exciton kinetic energy, and many flat exciton microstrip are produced. The molar excitonic band provides an attractive platform from which to explore and control the excited states of substances in transition metal dihalides, for example, topological Exciton and associated exciton Hubbard model. 《Observation of moiré excitons in WSe2/WS2 heterostructure superlattices》。Nature, 2019, 567, 76。
 

6. Beautiful and fantastic! Thin as the cicadas wings __PdMo bimetallene. 


PdMo bimetallene nanosheets with sub-nanometer thickness are highly bent and uniformly dispersed. The electrocatalysts for ORR and OER in highly efficient and stable alkaline electrolytes were prepared by Professor Guo Shaojun Peking University. As a cathode for zinc air and Lithium–air battery, PdMo bimetallene nanosheets are extremely active. 《PdMo bimetallene for oxygen reduction catalysis》。Nature, 2019, 574, 81。
 

7. The beauty of Chemical self-assembly: polyoxometalate (POM) single cluster self-assembled into ultrafine nanowires and nanorings. 



The assembly of atomic clusters into superstructures has great potential in structural adjustability and applications. Wang Xun and Wang Dong of Tsinghua University have constructed POM clusters into a series of single-cluster nanowires, single-cluster nanorings and three-dimensional hyperstructural components. By gradually adjusting the interaction at the molecular level, the configuration of nanowires can be changed from single clusters to nanorings. Up to 15 kinds of POM clusters can realize a series of single cluster nanostructures with different configurations. Single-cluster nanowires and three-dimensional superstructures have enhanced catalytic and electrochemical sensing activities, which shows the general function of single-cluster modules.《Single molecule–mediated assembly of polyoxometalate single-cluster rings and their three-dimensional superstructures》。Sci. Adv., 2019, 5, eaax1081。
 

8. The beauty of chemistry revolutionizes the information industry: Molecular self-assembly building functional logic circuits. 



The Damien Woods, David Doty and Erik Winfree teams at the California Institute of Technology reported on the design and experimental verification of a set of DNA tiles containing 355 single strand tiles, and it can be reprogrammed with a simple tile selection to implement a variety of 6-bit algorithms. Using this set, the researchers constructed 21 circuits that could perform algorithms, including copying, sorting, identifying palindromes and multiples of 3, random walks, obtaining unbiased choices from biased random sources, and selecting leaders, simulate Cellular Automaton, generate deterministic and random patterns, and count to 63, with an overall error rate of less than 1 in 3,000. These findings suggest that Molecular self-assembly may be a reliable algorithmic component of programmable chemical systems. The development of reprogrammable molecular machines (at a higher level of abstraction, so they don't need the underlying physics) will create a creative space in which molecular programmers can flourish. 《Diverse and robust molecular algorithms using reprogrammable DNA self-assembly》。Nature, 2019, 567, 366。
 

9. “Fly together, harmony partner”___Copper atom-pair  


Academician Li Yadong, Chen Chen and professor Xiao Hai of Tsinghua University have synthesized a catalyst with two adjacent copper atoms, called an "atom-on-atom catalyst" , they work together to complete the key bimolecular steps of carbon dioxide reduction. The atom-pair catalyst has stable Cu10–Cu1x+ pair structure, Cu1x+ adsorbs H2O and adjacent Cu10 adsorbs CO2, thus promoting the activation of CO2. The catalyst has a Faraday efficiency of more than 92% for CO formation, and competitive hydrogen evolution reactions are almost completely inhibited. Experimental characterization and Density functional theory showed that the adsorption configuration reduced the activation energy, resulting in higher selectivity, activity and stability at lower potential. 《Copper atom-pair catalyst anchored on alloy nanowires for selective and efficient electrochemical reduction of  CO2》。Nature Chemistry, 2019, 11, 222。
 10. Crystal Clear Pt-Ni alloy nano cage "Pearl Necklace” 


Professor Xia Baoyu of the University of central China and Professor Hung Wen Lou of the Nanyang Technological University have created a novel Nanochain of PtNi Alloy nanocages. The activity of this material for oxygen reduction reaction is 17 and 14 times higher than that of Pt / C catalyst. After 50,000 cycles, the catalyst's decline in activity is negligible. The experimental results and theoretical calculations show that the strong Pt-O sites are rare in the material due to the strain and ligand effects. 《Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells》。Science,2019,366, 850。
 
 
After reading the 2019 feast for the eyes of the nanomaterials, let us create a more beautiful wonderful 2020!
In no particular order
 


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