FIG 2 (IMAGE)

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FIG 2

Caption

Figure 2. Image observed by confocal Raman spectrometer microscope (a) when the single-beam optical trap is closed, with the detection region filled with a homogeneous and stable mixed solution; (b) when the single-beam optical trap is opened, with substances in the mixed solution captured by the optical trap emitted from the tapered fiber optical fiber; (c) schematic diagram of AgNPs gap when the single-beam optical trap is off and on; (d) Raman spectra of 10−6 mol/L CV obtained by opening and closing the single-beam optical trap of position 7 in 4(b); (e) Raman characteristic peak intensity at 913, 1177 and 1621 cm−1 in (d); (f) Raman line mapping obtained at different positions when the optical trap is open; (g) Raman characteristic peak intensity at 913 cm−1 in (f).

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