@Article{GonçalvesBAAQTBB:2021:SuVaVL,
               author = "Gon{\c{c}}alves, Rosana A. and Barros, Herick H. da Silva and 
                         Ara{\'u}jo, Luana S. and Antunes, Erica F. and Quade, Antje and 
                         Teodoro, M{\'a}rcio D. and Baldan, Maur{\'{\i}}cio Ribeiro and 
                         Berengue, O. M.",
          affiliation = "{Universidade Estadual Paulista (UNESP)} and {Universidade 
                         Estadual Paulista (UNESP)} and {Universidade Estadual Paulista 
                         (UNESP)} and {Universidade Estadual Paulista (UNESP)} and {INP 
                         Greifswald} and {Universidade Federal de S{\~a}o Carlos (UFSCar)} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Estadual Paulista (UNESP)}",
                title = "Suppression of vapor-liquid-solid (VLS) mechanism in the growth of 
                         \α-Sb2O4 nanobelts by a vapor-deposition approach",
              journal = "Materials Science in Semiconductor Processing",
                 year = "2021",
               volume = "134",
                pages = "e106006",
                month = "Nov.",
             keywords = "Nanorods, Sb2O4, VLS supression, VS mechanism, Zigzag nanobelts.",
             abstract = "In this work we report on the synthesis of novel \α-Sb2O4 
                         nanostructures synthesized by a gold catalyzed vapor deposition 
                         method in which metallic Sb is used as a precursor. Belts, rods 
                         and zigzag morphologies were obtained and characterized by a group 
                         of techniques which also provided data on crystalline structure 
                         and compositional aspects. Structural characterizations revealed 
                         that although the addition of gold nanoparticles plays an 
                         important role in the final growth of the nanostructures, no 
                         evidence of this element was found in the as-grown samples. In 
                         order to clarify the causes of the suppression of the VLS 
                         mechanism in these conditions, we carried out experiments in which 
                         the syntheses were interrupted in a controlled manner. Our 
                         findings revealed that at the early stages of the growth VLS 
                         mechanism is suppressed when high levels of Sb supersaturation are 
                         reached. A thick crystalline oxide layer rapidly grows at the 
                         liquid-gas interface providing preferential sites for the VS 
                         growth to take place. Low temperature photoluminescence 
                         measurements revealed a strong emission in the visible portion of 
                         electromagnetic spectra which can be associated to the presence of 
                         oxygen vacancies in these nanostructures.",
                  doi = "10.1016/j.mssp.2021.106006",
                  url = "http://dx.doi.org/10.1016/j.mssp.2021.106006",
                 issn = "1369-8001",
             language = "en",
           targetfile = "goncalves_suppression.pdf",
        urlaccessdate = "09 maio 2024"
}