(a) Schematic of the focused laser beam setup. SEM images of created micro-structures by focused laser beam. (b) Chinese characters. (c) A pyramid. (d) An inverted “

 L”

 . (e) 3D letters “

 NUS”

 . SEM images of the fabricated structures on CNT. (f-i) Created structures by applying different masks. (j-l) Microstructures on CNT created by programming the stage movement. (m) Different shapes created by controlling laser power. (a-e) are adapted with permission from Ref. [11]. (f-i) are adapted with permission from Ref. [12]. (j-l) are adapted with permission from Ref. [13]. (k) is adapted with permission from Ref. [14].

 (a) Optical and (b) SEM images of a micropattern on CuO nanowire arrays. (c) and (d) Morphology characterization before and after laser pruning. (e) and (f) Fusion of CuO nanowires. SEM and optical images of micropatterns on (g) GeSe2 nanoribbons, (h) CdSxSe1-x nanobelts, and (i) Si nanowire arrays. (a-f) are adapted with permission from Ref. [18]. (g) is adapted with permission from Ref. [19]. (h) is adapted with permission from Ref. [20]. (i) is adapted with permission from Ref. [17].

 Optical property modification. (a) and (b) FM images of micropatterns on CdSxSe1-x nanobelts film. (c) FM images of five microsquares created via different laser powers. V to I with decreasing laser powers. (d) PL spectra of pristine and three patterned regions. (e) PL peak position shifts as a function of laser power. Hidden micropatterns on Si nanowire arrays, (f) and (h) imaged by normal optical microscope, and (g) and (i) FM images. Two microscopies image the same sample: (f) versus (g), and (h) versus (i). (a-e) are adapted with permission from Ref. [20]. (f-i) are adapted with permission from Ref. [17].

 (a) Typical I-V curves of pristine CdSxSe1-x nanobelts film and its laser pruned counterpart. I-V curves under 660 nm laser irradiation of (b) pristine and (c) pruned nanobelts film. I-V curves under 808 nm laser irradiation of (d) pristine and (e) pruned nanobelts film. (f) On/off photocurrent response of pristine nanobelts (pink curve) and laser pruned nanobelts (green curve) to 660 nm laser. (g) On/off photocurrent response of pristine nanobelts (light blue curve) and laser pruned nanobelts (brown curve) to 808 nm laser. (h) I-V curves obtained from pristine GeSe2 and laser modified nanostructures. I-V responses of (i) the pristine and (j) modified NSs film under different laser sources with fixed laser intensity of ～0.8 mW mm2. (k-m) I-t responses of the nanostructures film before and after laser modification to 405 nm, 532 nm, and 808 nm light, respectively. (a-g) are adapted with permission from Ref. [20]. (h-m) are adapted with permission from Ref. [19].

 (a) CNT patterned via laser. (b) Field emission current versus time. (c) Water droplets landing on unpatterned CNT and on microwalls with a width of 7, 13, 21 μ

 m (from left to right). (d) Comparison of contact angles of a water droplet on microwalls with different dimensions. (e) Percentage of water droplets landing on one microwall with respect to the width of the microwall. (f) Laser initiated recovery of the hydrophobicity of the CNTs array. (a) and (b) are adapted with permission from Ref. [28]. (c-e) are adapted with permission from Ref. [29]. (f) is adapted with permission from Ref. [13].

 (a) CdSe/ZnS QDs of various sizes were pre-mixed and a CNT sample supported by a stick was lowered into the mixture for ～5 s. Subsequently, the sample was (b) dried in ambient in an upright position. (c) FM image of fractionated QDs. The red arrow indicates the direction in which the CNT sample was lowered into the mixture. (d-g) PL spectra of the emission peaks from the respective regions (I-IV) as indicated in (c). (h) Alternating micro-structures were first laser pruned onto aligned CNTs and the sample was then attached to a holder and dipped into CdSe/ZnS QDs of a particular size. (i) The CdSe/ZnS QDs only cover the CNTs up to the laser pruned boundary. (j) Rotating the sample by 180°