Preparation of polydiacetylene immobilized optically encoded beads

作者：Jun Bong Hyun; Baek Jongho; Kang Homan; Park Young June; Jeong Dae Hong^*; Lee Yoon Sik

来源：Journal of Colloid and Interface Science, 2011, 355(1): 29-34.

DOI：10.1016/j.jcis.2010.12.018

• Polydiacetylene
• Silver nanoparticles
• Surface-enhanced Raman scattering
• Optically encoded bead

Polydiacetylene (PDA), which can change the chromic and fluorescence properties by inducing environmental perturbations, is immobilized on planar solid supports for many biological applications. In this work, we immobilize PDA onto optically encoded spherical beads (PDA-SERS beads). The prepared PDA immobilized beads (36 mu m) exhibit a blue color without fluorescence. By inducing stress, their color and fluorescence properties are changed to red with fluorescence. The SERS spectra of the PDA-SERS beads can be recognized over the PDA background. Moreover, our PDA immobilization methods are successfully applied to silica-surface SERS-encoded beads (5 mu m) and proven to also be useful in fluorescence encoding systems.

• 出版日期2011-3-1