MSGID: 1:317/3 6275f5f6   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
    Powerful family of two-dimensional materials discovered    
    Researchers say the material has promising applications, such as in   
   advanced electronics and high-capacity batteries.    
      
     Date:   
         May 6, 2022   
     Source:   
         Tulane University   
     Summary:   
         A team has developed a new family of two-dimensional materials that   
         researchers say has great potential for many applications such as   
         batteries and supercapacitors, catalysis, sensors and electronics.   
      
      
      
   FULL STORY   
   ==========================================================================   
   A team from the Tulane University School of Science and Engineering has   
   developed a new family of two-dimensional materials that researchers   
   say has promising applications, including in advanced electronics and   
   high-capacity batteries.   
      
      
   ==========================================================================   
   Led by Michael Naguib, an assistant professor in the Department of   
   Physics and Engineering Physics, the study has been published in the   
   journal Advanced Materials.   
      
   "Two-dimensional materials are nanomaterials with thickness in the   
   nanometer size (nanometer is one millionth of a millimeter) and lateral   
   dimensions thousands of times the thickness," Naguib said. "Their flatness   
   offers unique set of properties compared to bulk materials."  The name of   
   the new family of 2D materials is transition metal carbo- chalcogenides,   
   or TMCC. It combines the characteristics of two families of 2D materials   
   -- transition metal carbides and transition metal dichalcogenides.   
      
   Naguib, the Ken & Ruth Arnold Early Career Professor in Science and   
   Engineering, said the latter is a large family of materials that has   
   been explored extensively and found to be very promising, especially   
   for electrochemical energy storage and conversion. But he said one of   
   the challenges in utilizing them is their low electrical conductivity   
   and stability.   
      
   On the other hand, he said, transition metal carbides are excellent   
   electrical conductors with much more powerful conductivity. Merging the   
   two families into one is anticipated to have great potential for many   
   applications such as batteries and supercapacitors, catalysis, sensors   
   and electronics.   
      
   "Instead of stacking the two different materials like Lego building blocks   
   with many problematic interfaces, here we develop a new 2D material that   
   has the combination of both compositions without any interface," he said.   
      
   "We used an electrochemical-assisted exfoliation process by   
   inserting lithium ions in-between the layers of bulk transition metals   
   carbo-chalcogenides followed by agitation in water," said Ahmad Majed,   
   the first author of the article and a doctoral candidate in Materials   
   Physics and Engineering at Tulane working in Naguib's group.   
      
   Unlike other exotic nanomaterials, Majed said, the process of making   
   these 2D TMCC nanomaterials is simple and scalable.   
      
   In addition to Naguib and Majed, the team includes Jiang Wei, an associate   
   professor in physics and engineering physics; Jianwei Sun, an assistant   
   professor in physics and engineering physics; PhD candidates Kaitlyn   
   Prenger, Manish Kothakonda and Fei Wang at Tulane; and Dr Eric N. Tseng   
   and professor Per O.A. Persson of Linkoping University in Sweden.   
      
   This study was supported by Naguib's National Science Foundation Career   
   Award that he received less than a year ago.   
      
      
   ==========================================================================   
   Story Source: Materials provided by Tulane_University. Note: Content   
   may be edited for style and length.   
      
      
   ==========================================================================   
   Journal Reference:   
      1. Ahmad Majed, Manish Kothakonda, Fei Wang, Eric N. Tseng, Kaitlyn   
      Prenger,   
         Xiaodong Zhang, Per O.AA. Persson, Jiang Wei, Jianwei Sun, Michael   
         Naguib. Transition Metal Carbo‐Chalcogenide "TMCC" a New   
         Family of Two‐dimensional Materials. Advanced Materials,   
         2022; 2200574 DOI: 10.1002/adma.202200574   
   ==========================================================================   
      
   Link to news story:   
   https://www.sciencedaily.com/releases/2022/05/220506141135.htm   
      
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