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Dang et al. Chem Synth 2023;3:14 https://dx.doi.org/10.20517/cs.2022.33 Page 13 of 20

Figure 6. (A) (i) Schematic of multimaterials thermal drawing; (ii) Optical photograph of the cross section of the as-drawn fiber;
(iii) SEM image of the fiber cross section after Se-nanowire formation; ) Ratio I /I dark versus power for the same fibers; ) Schematic
ph
of the fluorescence imaging system. Top: photograph of the “EPFL” logo filled with dye Rhodamine B dissolved in ethanol; bottom:
fluorescent image obtained with the hybrid fiber device [39] ; Copyright 2017, Wiley-VCH. (B) (i) Fabrication technique based on iterative
size reduction to produce ordered, indefinitely long nanowire and nanotube arrays; (ii) A polymer-embedded nanowire array rolled
around a pencil; (iii) Cross-sectional SEM micrographs from both sides of a 10-m-long polymer fibre that contains hundreds of
nanowires; (iv) The photoconductance from a selenium nanowire in the dark and on white-light illumination [70] ; Copyright 2011, Nature
Publishing Group. (C) (i) Schematic illustration of the Se nanobelts photodetectors on transparent and flexible PET film; (ii) Optical
transmittance spectra of Se nanobelts photodetector, the inset shows a picture of the photodetectors on PET film; (iii) Photoresponse
of the photodetector a PET substrate with different bending angles, the inset shows a picture of the bending setup [94] ; Copyright 2012,
Royal society of chemistry. (D) (i) 3D illustration of the Se-PENG device; (ii) Optical images of the device in the original state, being
stretched and twisted, respectively; (iii) The output current of the Se-PENG attached on the human fingers and bent with different
angles; (iv) and (v) The real-time artery pulse signal monitored by the Se-PENG [85] ; Copyright 2015, Elsevier.