MARANI, DEBORAMORAES, LETICIA P.R.GUALANDRIS, FABRIZIOSANNA, SIMONEFLORIO, DANIEL Z. deESPOSITO, VINCENZOFONSECA, FABIO C.2018-07-172018-07-172018MARANI, DEBORA; MORAES, LETICIA P.R.; GUALANDRIS, FABRIZIO; SANNA, SIMONE; FLORIO, DANIEL Z. de; ESPOSITO, VINCENZO; FONSECA, FABIO C. Nucleation front instability in two-dimensional (2D) nanosheet gadolinium-doped cerium oxide (CGO) formation. <b>CrystEngComm</b>, v. 20, n. 10, p. 1405-1410, 2018. DOI: <a href="https://dx.doi.org/10.1039/c7ce01737e">10.1039/c7ce01737e</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/28967.1466-8033http://repositorio.ipen.br/handle/123456789/28967Herein we report for the first time the synthesis of ceramic-organic three-dimensional (3D) layered gadolinium-doped cerium oxide (Ce1-XGdXO2-delta,CGO) and its exfoliation into two-dimensional (2D) nano-sheets. We adopt a water-based synthetic route via a homogenous precipitation approach at low temperatures (10-80 degrees C). The reaction conditions are tuned to investigate the effects of thermal energy on the final morphology. A low temperature (40 degrees C) morphological transition from nanoparticles (1D) to two-dimensional (2D) nanosheets is observed and associated with a low thermal energy transition of ca. 2.6 kJ mol(-1). For the 3D-layered material, exfoliation experiments are conducted in water/ethanol solutions. Systems at volume fractions ranging from 0.15 to 0.35 are demonstrated to promote under ultrasonic treatment the delamination into 2D nanosheets.1405-1410closedAccessnucleationinstabilitynanoparticlesgadoliniumdoped materialscerium oxideslaser materialsArtigo de periódico102010.1039/c7ce01737ehttps://orcid.org/0000-0003-0708-202172.4285.33