公开(公告)号：US20240328013A1

公开(公告)日：2024-10-03

申请号：US18617664

申请日：2024-03-27

申请人： City University of Hong Kong

发明人： Hua ZHANG ,  Zijian LI ,  An ZHANG ,  Li ZHAI

IPC分类号： C25B11/089 ,  C25B9/23

CPC分类号： C25B11/089 ,  C25B9/23

摘要： A method for synthesizing high-entropy alloy (HEA) nanostructures, each having a HEA shell uniformly grown on a nanocore, is provided. The method comprises: mixing nanostructure seeds, a plurality of metal precursors, one or more reducing agents and a surfactant in a solvent to form a first mixture; subjecting the first mixture to ultrasonication under an ultrasonication temperature; degassing the first mixture upon heating at a degassing temperature under vacuum with magnetic stirring; purging the first mixture with an inert gas; and keeping the first mixture at a growth temperature for a growth time to form the HEA nanostructures. The provided method is a low-temperature, facile, general, wet-chemical, seeded epitaxial growth method which can synthesize a library of unconventional-phase HEA nanostructures, e.g., 4H-Au@HEA nanowires and 2H/fcc-Au@HEA nanosheets with 5-10 components by using 4H-Au NWs and 2H/fcc-Au NSs as seeds respectively.

公开(公告)号：US20240043694A1

公开(公告)日：2024-02-08

申请号：US18358899

申请日：2023-07-25

申请人： City University of Hong Kong

发明人： Hua ZHANG ,  Zijian LI ,  Li ZHAI

IPC分类号： C09C1/62 ,  C09C3/06

CPC分类号： C09C1/62 ,  C09C3/063 ,  C01P2004/80 ,  C01P2004/16 ,  C01P2004/04 ,  C01P2002/85 ,  C01P2002/82 ,  C01P2004/03 ,  C01P2002/72 ,  G01N21/658

摘要： A method of forming a 1T′-phase transition metal dichalcogenide monolayer. A transition metal precursor and a first solvent are mixed to form a first mixture. A non-oxygen chalcogen or non-oxygen chalcogen precursor and a second solvent are mixed to form a second mixture. The first mixture is rapidly injected into the second mixture at a temperature between approximately 250 and 350° C. to form a third mixture. 1T′-transition metal dichalcogenide monolayers are recovered from the third mixture. The transition metals may be molybdenum or tungsten, while the non-oxygen chalcogens may be sulfur, selenium, or tellurium. The 1T′-transition metal dichalcogenide monolayers can be grown on a variety of metal substrates to form metal@ 1T′-transition metal dichalcogenide monolayer heterostructures. A flexible 4H-Au@1T′-WS2/SiO2/PDMS SERS tape was fabricated to detect the SARS-CoV-2 spike protein. The tape is capable of attomole-level detection of SARS-CoV-2 spike protein, for real-time monitoring of COVID-19.