Fluorescence enhancement by heterostructure colloidal photonic crystals with dual stopbands

In this work, we present a facile approach on the remarkable enhancement of fluorescent signal by heterostructure colloidal photonic crystals (PCs) with dual stopbands. The intensity of fluorescent medium on heterostructure PCs with dual stopbands overlapping the excitation wavelength and the emission wavelength of fluorescent medium can be up to 162-fold enhancement in comparison to that on the control sample. Otherwise, parameters of heterostructure PC films such as film thickness or stacking order have important effects on fluorescent signals. The method will be of great significance for developing the highly sensitive fluorescence-based detection.

Graphical abstractA remarkable enhancement of fluorescence signal based on heterostructure photonic crystals with dual stopbands is demonstrated in comparison to that on the control sample.Figure optionsDownload full-size imageDownload high-quality image (86 K)Download as PowerPoint slideResearch highlights► A facile approach on the fluorescent enhancement by heterostructure PCs is presented. ► Dual stopbands of heterostructure PCs overlap the excitation and emission wavelength. ► The parameters of heterostructure PCs have important effects on fluorescence signals. ► The approach provides a promising strategy for the sensitive fluorescence-based detection.