• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Effect of an anionic surfactant (SDS) on the photoluminescence of graphene oxide (GO) in acidic and alkaline medium
【24h】

Effect of an anionic surfactant (SDS) on the photoluminescence of graphene oxide (GO) in acidic and alkaline medium

机译：阴离子表面活性剂（SDS）对酸性和碱性介质中氧化石墨烯（GO）的光致发光的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An anionic surfactant (SDS) modulates the photoluminescence of graphene oxide (GO) in both acidic and alkaline medium. In the acidic medium (pH ≈ 2), formation of hemi spherical surface micelles on the GO sheets creates a non-polar environment around the flourophoric moiety of GO and hinders the solvent relaxation. This leads to a significant 36 nm blue shift of the photoluminescence band, whereas in alkaline medium (pH ≈ 10), SDS interacts with GO sheets in a different way due to the presence of negatively charged carboxylate ions at the GO edges. The repulsion between the negatively charged GO sheets and the intercalation of SDS within the basal planes of GO may weaken π–π stacking interaction which produces largely separate layers of GO. The largely separated GO sheets due to very weak stacking interactions among successive layers may behave almost like isolated functionalized GO, resulting in an enhancement of the photoluminescence intensity at 303 nm.
机译：阴离子表面活性剂（SDS）可以调节酸性和碱性介质中氧化石墨烯（GO）的光致发光。在酸性介质（pH≈2）中，GO片层上半球形表面胶束的形成在GO的荧光部分周围形成了一个非极性环境，并阻碍了溶剂的松弛。这会导致光致发光带发生明显的36 nm蓝移，而在碱性介质（pH≈10）中，由于GO边缘存在带负电荷的羧酸根离子，SDS与GO片以不同的方式相互作用。带负电的GO片之间的排斥力和GO的基平面内SDS的插入可能会削弱π-π堆叠相互作用，从而产生大量单独的GO层。由于相继的层之间非常弱的堆叠相互作用而导致高度分离的GO片的行为几乎类似于隔离的功能化GO，从而增强了303 nm处的光致发光强度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号