An Evaluation of Fluorescent Orthodontic Adhesives Containing Eu-doped ZnO at Room Temperature
An Evaluation of Fluorescent Orthodontic Adhesives Containing Eu-doped ZnO at Room Temperature
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DOI：
10.11344/nano.5.31
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Shuichi Yamagata;H. Iwasaki;Yusuke Hamba;K. Nakanishi;Natsumi Ushijima;S. Abe;T. Akasaka;F. Watari;J. Iida
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文献类型：
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作者：
Shuichi Yamagata;H. Iwasaki;Yusuke Hamba;K. Nakanishi;Natsumi Ushijima;S. Abe;T. Akasaka;F. Watari;J. Iida
使正畸粘合剂可见对于正畸治疗后更安全和完全去除正畸粘合剂非常重要。本文报道了我们在氧化锌晶格中掺杂三价铕离子使正畸粘接剂在紫光或近紫外光照射下可见的研究。所合成的产物的初级晶体在纳米尺度上，尽管它们的尺寸和结晶度随退火温度而变化。X射线衍射（XRD）图谱与六方纤锌矿ZnO的图谱非常一致，除了从200 ℃退火获得的产物获得的图谱之外。然而，关于光致发光，含有ZnO：Eu 3+颗粒的聚合物粘合剂显示对应于Eu 3+的4f内跃迁的特征激发和发射峰，尽管这些峰不强烈和尖锐。我们认为，声子共振可以被认为是最可接受的原因，在本研究中观察到的不足的光致发光铭记，声子共振是起源于Zn晶体。目前，我们得出的结论是，纳米氧化锌可能有许多缺陷。通过控制合成过程中缺陷的形成，我们相信ZnO：Eu 3+纳米晶体将变得更加有用，有助于开发新的荧光正畸粘合剂。
Making orthodontic adhesives visible is important for their safer and complete removal after orthodontic treatments. In this paper, we report our research on doping trivalent europium ions into lattices of zinc oxides to make orthodontic adhesives visible under purple or near ultraviolet light irradiation. The primary crystals of the synthesized products were on the nanoscale, although their size and crystallinity varied with the annealing temperatures. The X-ray diffraction (XRD) patterns were in good agreement with that of hexagonal wurtzite ZnO with the exception of patterns acquired from the products obtained by annealing at 200 C. However, with regard to the photoluminescence, the polymer adhesives containing ZnO: Eu3+ particles indicated characteristic excitation and emission peaks corresponding to the intra-4f transitions of Eu3+, although these peaks were not intense and sharp. We think that the phonon resonance can be considered as the most acceptable cause for the insufficient photoluminescence observed in this study bearing in mind that the phonon resonance is originated from the Zn interstitials. At the current moment, we conclude that the nanocrystalline ZnO could have numerous defects. By controlling the formation of defects during synthesis, we believe that the ZnO: Eu3+ nanocrystals will become much more useful toward developing new fluorescent orthodontic adhesives.