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三角形納米銀片合成及其性能表征
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國家自然科學(xué)基金（50272032）；廣東省自然科學(xué)基金（7300212）；電子科技大學(xué)中山學(xué)院科研啟動基金項目資助


Synthesis of Triangular Silver Nanoplates and Their Properties Characterization
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    摘要:

    在適量的二異辛基磺化琥珀酸鈉和檸檬酸鈉表面修飾劑存在下，采用硼氫化鈉還原硝酸銀，在一定的水浴條件下合成出高產(chǎn)率的形貌規(guī)則的三角形納米銀片。透射電子顯微鏡、高分辨透射電子顯微鏡、原子力顯微鏡和X射線衍射儀表征表明，銀納米片是具有整齊的原子排列的良好單晶體。紫外-可見－近紅外分光光度計表征表明，納米銀三角形片的面內(nèi)偶極共振峰可達約1230 nm的近紅外波段。這種特殊的光譜學(xué)特征使得三角形納米銀片在光熱觸發(fā)釋放藥物、紅外吸收及光纖等領(lǐng)域具有重要的用途。研究結(jié)果表明，只有在一定的二異辛基磺化琥珀酸鈉濃度、反應(yīng)時間及pH值條件下才能夠獲得高產(chǎn)率、形貌規(guī)則的三角形納米銀片。根據(jù)對三角形納米銀片生長過程的顯微鏡結(jié)構(gòu)表征提出了以三角形框形成為框架的納米三角形融合生長機制。

    Abstract:

    The large-scale regular silver triangular nanoplates were synthesized by the reduction of silver nitrate with sodium borohydride in the presence of sodium citrate and dioctyl sulfosuccinate sodium salt (AOT) and in the water bath. The morphologies of silver triangular nanoplates were studied by transmission electron microscopy, high resolution transmission electron microscopy and atomic force microscopy and X-ray diffraction. The optical properties were studied by UV-visible—infrared photospectrometery. The results confirm that the silver nanoplates are the single crystallinity with regular arrangement of atoms. The optical in-plane dipole plasmon band of the silver nanoplate has been extended to about 1230 nm, which is in the near-infrared (NIR) regime. Studies from different AOT concentrations, pH values and reaction time demonstrate that triangular nanoframe-mediated growth mechanism is supported only in the proper experimental conditions.

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王悅輝,張 琦,王 婷,周 濟.三角形納米銀片合成及其性能表征[J].稀有金屬材料與工程,2011,40(12):2207~2211.[Wang Yuehui, Zhang Qi, Wang Ting, Zhou Ji. Synthesis of Triangular Silver Nanoplates and Their Properties Characterization[J]. Rare Metal Materials and Engineering,2011,40(12):2207~2211.]
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  • 收稿日期:2010-12-11
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