Please use this identifier to cite or link to this item: https://doi.org/10.1002/adfm.202008639
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dc.titleEvolution of Anisotropic Arrow Nanostructures during Controlled Overgrowth
dc.contributor.authorWANG WENHUI
dc.contributor.authorIVAN EROFEEV
dc.contributor.authorPROLOY NANDI
dc.contributor.authorYAN HONGWEI
dc.contributor.authorUTKUR MIRZIYODOVICH MIRSAIDOV
dc.date.accessioned2021-03-23T07:22:32Z
dc.date.available2021-03-23T07:22:32Z
dc.date.issued2021-02-25
dc.identifier.citationWANG WENHUI, IVAN EROFEEV, PROLOY NANDI, YAN HONGWEI, UTKUR MIRZIYODOVICH MIRSAIDOV (2021-02-25). Evolution of Anisotropic Arrow Nanostructures during Controlled Overgrowth. Advanced Functional Materials. ScholarBank@NUS Repository. https://doi.org/10.1002/adfm.202008639
dc.identifier.issn1616301X
dc.identifier.issn16163028
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/187522
dc.description.abstractAnisotropic metal nanoparticles (NPs), such as high‐aspect‐ratio Au nanorods (NRs), play an important role for applications in photocatalysis, sensing, and drug delivery because of their adjustable plasmon resonances. Their performance for these applications can be further improved by fine‐tuning their morphologies. Achieving desired NP architectures requires insight into their formation mechanisms. Here, liquid‐phase transmission electron microscopy is used to directly follow the overgrowth of Au NR seeds into nanoarrows (NAs) with fourfold symmetric wings along the sides. Adding thiol molecules like L‐cysteine to the growth solution can lead to the formation of NAs with periodic prismatic teeth instead of the straight side wings. These observations suggest that this transition is controlled by binding of L‐cysteine to the NR surface, which in turn, slows down the metal deposition rate, switching the overgrowth from the kinetically to thermodynamically controlled process. Furthermore, simulations demonstrate that these prismatic teeth enhance the NPs’ plasmonic properties. The study describes how thiol additives control the morphological evolution of metal NPs, which is important for the fabrication of NPs with tailored shapes for a broad range of applications.
dc.language.isoen
dc.publisherAdvanced Functional Materials
dc.subjectanisotropic nanoparticles
dc.subjectelectric field enhancement
dc.subjectliquid‐phase TEM
dc.subjectthermodynamic controlled growth
dc.typeArticle
dc.contributor.departmentBIOLOGICAL SCIENCES
dc.contributor.departmentPHYSICS
dc.description.doi10.1002/adfm.202008639
dc.description.sourcetitleAdvanced Functional Materials
dc.published.statePublished
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