Session 6 Material

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Qiang Tao (State Lab. Superhard Materials, Jilin U.), Quan Gan, Yanli Chen, Shuai Zhang, Fei Wang, Jiaen Cheng, He Liu, Hang Xu, Xin Wang, Shushan Dong, Pinwen Zhu
Designing Robust Hydrophobic Materials in Transition Metal Diborides

Comments: 3
  • #3

    Longjian Xie (Monday, 27 September 2021 14:07)

    Hi Qiang Tao,

    Thank you very much for the detailed answer.

  • #2

    Qiang Tao (Monday, 27 September 2021 05:51)

    Hi, Longjian Xie.

    Thank you very much for your comments. It is a very good question, the reviewer of this article also asked the same question.

    We agree with your opinion that water-drop cannot contact the edge sides in needles matrix for Cassi-Baxter model. However, in this case, not all of the needles on the surface of samples are perpendicular to the surface, a part of needles has the angle with surface is less than 90° which is not completely abide by Cassi-Baxter model. Water-drop can tough the edge sides in these needles, and lower surface energy of edge sides is one reason of improving hydrophobicity. So, in our sample, the improving of hydrophobicity are come from both the Young’s model change to the Cassi-Baxter model (Coarse surface and the cap of amorphous boron touch with water), and lower surface energy of edge sides(edge sides of TiB2 touch with water).

    Thank you again!

  • #1

    Longjian xie (Thursday, 23 September 2021 11:41)

    Hi Qiang Tao,

    I have a question on the reason why the hydrophobic of TiB2 occurs.
    The main reason you mentioned is because of needle-like morphology.
    Because there is an amorphous B cap on the needle, the real interface should be the interface between amorphous B and water, instead of TiB2 and water.
    How do you think about the contribution of amorphous B to the hydrophobic of TiB2?

Huiyang Gou (HPSTAR)
High pressure synthesis of functional materials

Lucien Eisenburger (Dep. Chemistry, U. Munich), Oliver Oeckler & Wolfgang Schnick
NH4F-Assisted Multi-Anvil Syntheses of Novel Nitrides

Hu Tang (BGI, U. Bayreuth), Xiaohong Yuan, Yong Cheng, Hongzhan Fei, Fuyang Liu, Tao Liang, Zhidan Zeng, Takayuki Ishii, Ming-Sheng Wang, Tomoo Katsura, Howard Sheng, Huiyang Gou
Synthesis of a novel carbon material, paracrystalline diamond

Ulrich Häussermann (Dep. Materials & Envrionm. Chemistry, Stockholm U.), Holger Kohlmann & Kristina Spektor
In-situ studies of hydrogenation reactions at gigapascal pressures

Comments: 2
  • #2

    Ulrich (Thursday, 23 September 2021 23:24)

    much cleaner and especially sharp decomposition process below 300 C. also alkanes may produce reactive carbonaceous intermediates and the sample would need to be protected from the hydrogen source (we never found this necessary for BH3NH3).

  • #1

    Tomoo Katsura (Thursday, 23 September 2021 13:11)

    It is a nice idea to use BH3NH3 as a hydrogen source. However, what is the merit to use this material compared to alkanes?