TY - JOUR
T1 - Regiospecific Cation Exchange in Nanocrystals and Its Potential in Diversifying the Nanostructural Library
AU - Hong, Yongju
AU - Venkateshalu, Sandhya
AU - Jeong, Sangyeon
AU - Park, Jongsik
AU - Lee, Kwangyeol
N1 - Publisher Copyright:
© 2022 The Authors. Small Science published by Wiley-VCH GmbH.
PY - 2023/1
Y1 - 2023/1
N2 - The cation-exchange reaction (CER), a promising nanocrystal (NC) engineering strategy, has undergone rapid progress in the past decade, sparking a big wave of interest in the post-synthetic tuning of chemical compositions, crystal phases, interfaces, morphologies, and corresponding properties. However, a significant gap has existed between the theoretical and actual CERs, hindering the popularization of CERs for explosive expansion in NC designs. A notable roadblock in this area has been the inability to control the site of cation exchange within the nanostructure, although partial cation exchange at desired sites can open an avenue to the vast structural diversity of nanostructures and accompany new physicochemical properties. Several notable successes have been recorded recently in fabricating predesigned hetero-nanostructures by thoroughly understanding the principles of cation exchange and by exploiting the peculiarity of each crystal system. Herein, recent advances achieved in the CER are introduced, unraveling the critical factors controlling regiospecificity by analyzing the developed theories and accumulated experimental results. It is further described how this knowledge can be harnessed to design advanced NCs, and the beneficial effect of regiospecificity on material properties is highlighted. Finally, the challenges and research directions are provided to encourage further research in this burgeoning field.
AB - The cation-exchange reaction (CER), a promising nanocrystal (NC) engineering strategy, has undergone rapid progress in the past decade, sparking a big wave of interest in the post-synthetic tuning of chemical compositions, crystal phases, interfaces, morphologies, and corresponding properties. However, a significant gap has existed between the theoretical and actual CERs, hindering the popularization of CERs for explosive expansion in NC designs. A notable roadblock in this area has been the inability to control the site of cation exchange within the nanostructure, although partial cation exchange at desired sites can open an avenue to the vast structural diversity of nanostructures and accompany new physicochemical properties. Several notable successes have been recorded recently in fabricating predesigned hetero-nanostructures by thoroughly understanding the principles of cation exchange and by exploiting the peculiarity of each crystal system. Herein, recent advances achieved in the CER are introduced, unraveling the critical factors controlling regiospecificity by analyzing the developed theories and accumulated experimental results. It is further described how this knowledge can be harnessed to design advanced NCs, and the beneficial effect of regiospecificity on material properties is highlighted. Finally, the challenges and research directions are provided to encourage further research in this burgeoning field.
KW - anion exchange
KW - cation exchange
KW - copper sulfide
KW - heterostructures
KW - regiospecificity
UR - http://www.scopus.com/inward/record.url?scp=85159604045&partnerID=8YFLogxK
U2 - 10.1002/smsc.202200063
DO - 10.1002/smsc.202200063
M3 - Article
AN - SCOPUS:85159604045
SN - 2688-4046
VL - 3
JO - Small Science
JF - Small Science
IS - 1
M1 - 2200063
ER -