Journal
LANGMUIR
Volume 36, Issue 49, Pages 15162-15168Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.0c02905
Keywords
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Funding
- National Natural Science Foundation of China [51525302, 51933005, 51703072]
- Program for HUST Academic Frontier Youth Team [2015-01]
- State Key Laboratory of Polymer Physics and Chemistry, CIAC, CAS [2017-27]
- HUST Analytical and Testing Center
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Modification of nanorods (NRs) with functional polymer ligands is of great significance to enhance their surface chemistry and prompt their applications in many fields (e.g., photothermal therapy, bioimaging, and catalysis). However, the regioselective modification of AuNRs still remains a great challenge. Herein, we introduce a facile yet versatile strategy to achieve the regioselective modification of AuNRs through a solvent quality-mediated strategy. By employing a poor solvent of the original ligand cetyltrimethylammonium bromide (CTAB) as the medium in the modification, polymer ligands would selectively graft onto the two ends of AuNRs, while polymer ligands would graft onto the entire surface when employing a good solvent. This strategy demonstrates good reproducibility and is applicable to both hydrophilic and hydrophobic polymer ligand modifications. Moreover, by combing our strategy with the preoccupation route, the two ends and sidewall of AuNRs modified by two different polymers form an ABA-type building block, which can further self-assemble into well-ordered superstructures. Our finding provides a new opportunity for multifunctionalization of NRs.
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