title: Direct laser pruning of CdS(x)Se1-x nanobelts en route to a multicolored pattern with controlled functionalities.
abstract: CdS(x)Se(1-x) nanobelts are interesting nanostructured materials with a tunable band gap from 1.7 to 2.4 eV depending on the nanobelts' stoichiometry. On the basis of their chemical compositions, these nanobelts give out strong photoluminescence with unique color. In this work, we demonstrate that a direct focused laser beam irradiation was able to achieve localized modification of the chemical composition of the nanobelts. As a result, we could locally change the optical properties of these nanobelts. With a scanning laser beam, micropatterns with a wide range of fluorescence color could be created on a substrate covered with ternary nanobelts without a prepatterned mask. The laser modified nanobelts showed higher resistance to acid corrosion and these nanobelts exhibited more superior photoconductivity. The construction of micropatterns with functionality/color control within the sample would provide greater building blocks for photoelectronic applications.
authors.affiliation: Department of Physics, National University of Singapore, 2 Science Drive 3, 117542 Singapore.
authors.forename: Junpeng
authors.initials: J
authors.lastname: Lu
authors.forename: Xiaodai
authors.initials: X
authors.lastname: Lim
authors.forename: Minrui
authors.initials: M
authors.lastname: Zheng
authors.forename: Subodh G
authors.initials: SG
authors.lastname: Mhaisalkar
authors.forename: Chorng-Haur
authors.initials: CH
authors.lastname: Sow
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry* / Q000528:radiation effects; D003116:Color; D003124:Colorimetry / Q000379:methods*; D007834:Lasers; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D018036:Selenium Compounds / Q000737:chemistry* / Q000528:radiation effects; D013440:Sulfides / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D013440:Sulfides; C034939:cadmium sulfide; C058667:cadmium selenide