Fluorescence enhancement of radix angelica dahurica by binding to single silver sphere<xref ref-type="fn" rid="cpb141709fn1">*</xref>

Fluorescence enhancement of radix angelica dahurica by binding to single silver sphere*

Wang Qing-Ru^a),^b)†, Shi Qiang^a),^b), Li Shu-Hong^a),^b), Wang Wen-Jun^a),^b)

The excitation enhancement factor versus the distance away from the center of a 21 nm silver sphere.