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pH-controlled growth of triangular silver nanoprisms on a large scale
Zhishan Zhang1, Ji Yu1, Jianhui Zhang1
1National Laboratory of Solid State Microstructures, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University Nanjing 210093 P. R. China mgu@nju.edu.cn zhangjh@nju.edu.cn.
Nanoscale Advances
|September 22, 2022
Summary
Researchers developed a simple, large-scale method for synthesizing triangular silver nanoprisms (TSNPRs). Adjusting sodium hydroxide pentanol solution dosage controls TSNPR size, enabling reproducible synthesis for diverse applications.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Silver nanoprisms are valuable nanomaterials with unique optical properties.
- Existing synthesis methods can be complex, lack reproducibility, or are difficult to scale.
- Controlling the size and shape of silver nanoprisms is crucial for optimizing their applications.
Purpose of the Study:
- To develop a simple, mild, and reproducible one-pot method for large-scale synthesis of triangular silver nanoprisms (TSNPRs).
- To investigate the effect of sodium hydroxide pentanol solution dosage on TSNPR size.
- To ensure the synthesis is pH-independent and yields well-defined TSNPR shapes.
Main Methods:
- A one-pot synthesis approach using a water/polyvinylpyrrolidone/n-pentanol ternary system.
- Tailoring TSNPR size by adjusting the dosage of sodium hydroxide pentanol solution.
- Utilizing N,N-dimethyl formamide and formamide for pH control and shape improvement.
Main Results:
- Successful large-scale synthesis of triangular silver nanoprisms (TSNPRs).
- TSNPR size was controllably tuned from 30 to 100 nm.
- The method demonstrated high reproducibility and independence from initial polyvinylpyrrolidone pH.
- Synthesized TSNPRs exhibited well-defined shapes and narrow extinction bands.
Conclusions:
- A scalable and reproducible one-pot method for synthesizing triangular silver nanoprisms was established.
- The developed method allows for precise control over TSNPR size.
- The narrow extinction bands of the synthesized TSNPRs indicate their potential for chemical and biological applications.
