Fig. 1. Characteristic absorption spectrum, TEM image and color of triangular Ag nanoplates. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
Transmission electron microscope (TEM) images were obtained on a Hitachi (H-7650, 80 kV) transmission electron microscope.
2.3. Preparation of triangular silver nanoplates
All glasswares for preparation of triangular silver nanoplates were washed thoroughly with aqua regia before use. The triangu- lar silver nanoplates were synthesized according to the method reported by Metraux and Mirkin [16]. Briefly, a solution of AgNO3
(0.1 mM, 50 mL), and trisodium citrate (30 mM, 3 mL) were mixed
under vigorously stirred for a few minutes at room temperature. Then, 3 mL of PVP (0.7 M) and hydrogen peroxide (30 wt.%, 120 �L) were added into the mixture under stirring. Finally, 300 �L of 0.1 M freshly prepared NaBH4 in ice water was rapidly injected into the above solution under stirring for 30 min, and the solution changed gradually from colorless to yellow, red, and blue, indicating the for- mation of triangular silver nanoplates (Fig. 1). The stability of the silver nanoplates is an important issue in application for the detec- tion of H2O2. Therefore, the stability of the silver nanoplates was checked. As shown in Fig. 2, the results show that the shapes o triangular silver nanoplates had no obvious change after 1-month of storage in water solution
Fig. 1. Characteristic absorption spectrum, TEM image and color of triangular Ag nanoplates. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)Transmission electron microscope (TEM) images were obtained on a Hitachi (H-7650, 80 kV) transmission electron microscope.2.3. Preparation of triangular silver nanoplatesAll glasswares for preparation of triangular silver nanoplates were washed thoroughly with aqua regia before use. The triangu- lar silver nanoplates were synthesized according to the method reported by Metraux and Mirkin [16]. Briefly, a solution of AgNO3(0.1 mM, 50 mL), and trisodium citrate (30 mM, 3 mL) were mixedunder vigorously stirred for a few minutes at room temperature. Then, 3 mL of PVP (0.7 M) and hydrogen peroxide (30 wt.%, 120 �L) were added into the mixture under stirring. Finally, 300 �L of 0.1 M freshly prepared NaBH4 in ice water was rapidly injected into the above solution under stirring for 30 min, and the solution changed gradually from colorless to yellow, red, and blue, indicating the for- mation of triangular silver nanoplates (Fig. 1). The stability of the silver nanoplates is an important issue in application for the detec- tion of H2O2. Therefore, the stability of the silver nanoplates was checked. As shown in Fig. 2, the results show that the shapes o triangular silver nanoplates had no obvious change after 1-month of storage in water solution
การแปล กรุณารอสักครู่..