TY  - JOUR
AU  - Sandoval, Stefania
AU  - Kepić, Dejan P.
AU  - Perez del Pino, Angel
AU  - Gyorgy, Eniko
AU  - Gomez, Andres
AU  - Pfannmoeller, Martin
AU  - Tendeloo, Gustaaf Van
AU  - Ballesteros, Belen
AU  - Tobias, Gerard
PY  - 2018
UR  - http://pubs.acs.org/doi/10.1021/acsnano.8b01638
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7933
AB  - The electronic and optical properties of two-dimensional layered materials allow the miniaturization of nanoelectronic and optoelectronic devices in a competitive manner. Even larger opportunities arise when two or more layers of different materials are combined. Here, we report on an ultrafast energy efficient strategy, using laser irradiation, which allows bulk synthesis of crystalline single-layered lead iodide in the cavities of carbon nanotubes by forming cylindrical van der Waals heterostructures. In contrast to the filling of van der Waals solids into carbon nanotubes by conventional thermal annealing, which favors the formation of inorganic nanowires, the present strategy is highly selective toward the growth of monolayers forming lead iodide nanotubes. The irradiated bulk material bearing the nanotubes reveals a decrease of the resistivity as well as a significant increase in the current flow upon illumination. Both effects are attributed to the presence of single-walled lead iodide nanotubes in the cavities of carbon nanotubes, which dominate the properties of the whole matrix. The present study brings in a simple, ultrafast and energy efficient strategy for the tailored synthesis of rolled-up single-layers of lead iodide (i.e., single-walled PbI2 nanotubes), which we believe could be expanded to other two-dimensional (2D) van der Waals solids. In fact, initial tests with ZnI2 already reveal the formation of single-walled ZnI2 nanotubes, thus proving the versatility of the approach.
T2  - ACS Nano
T1  - Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration
VL  - 12
IS  - 7
SP  - 6648
EP  - 6656
DO  - 10.1021/acsnano.8b01638
ER  - 

@article{
author = "Sandoval, Stefania and Kepić, Dejan P. and Perez del Pino, Angel and Gyorgy, Eniko and Gomez, Andres and Pfannmoeller, Martin and Tendeloo, Gustaaf Van and Ballesteros, Belen and Tobias, Gerard",
year = "2018",
abstract = "The electronic and optical properties of two-dimensional layered materials allow the miniaturization of nanoelectronic and optoelectronic devices in a competitive manner. Even larger opportunities arise when two or more layers of different materials are combined. Here, we report on an ultrafast energy efficient strategy, using laser irradiation, which allows bulk synthesis of crystalline single-layered lead iodide in the cavities of carbon nanotubes by forming cylindrical van der Waals heterostructures. In contrast to the filling of van der Waals solids into carbon nanotubes by conventional thermal annealing, which favors the formation of inorganic nanowires, the present strategy is highly selective toward the growth of monolayers forming lead iodide nanotubes. The irradiated bulk material bearing the nanotubes reveals a decrease of the resistivity as well as a significant increase in the current flow upon illumination. Both effects are attributed to the presence of single-walled lead iodide nanotubes in the cavities of carbon nanotubes, which dominate the properties of the whole matrix. The present study brings in a simple, ultrafast and energy efficient strategy for the tailored synthesis of rolled-up single-layers of lead iodide (i.e., single-walled PbI2 nanotubes), which we believe could be expanded to other two-dimensional (2D) van der Waals solids. In fact, initial tests with ZnI2 already reveal the formation of single-walled ZnI2 nanotubes, thus proving the versatility of the approach.",
journal = "ACS Nano",
title = "Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration",
volume = "12",
number = "7",
pages = "6648-6656",
doi = "10.1021/acsnano.8b01638"
}

Sandoval, S., Kepić, D. P., Perez del Pino, A., Gyorgy, E., Gomez, A., Pfannmoeller, M., Tendeloo, G. V., Ballesteros, B.,& Tobias, G.. (2018). Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration. in ACS Nano, 12(7), 6648-6656.
https://doi.org/10.1021/acsnano.8b01638

Sandoval S, Kepić DP, Perez del Pino A, Gyorgy E, Gomez A, Pfannmoeller M, Tendeloo GV, Ballesteros B, Tobias G. Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration. in ACS Nano. 2018;12(7):6648-6656.
doi:10.1021/acsnano.8b01638 .

Sandoval, Stefania, Kepić, Dejan P., Perez del Pino, Angel, Gyorgy, Eniko, Gomez, Andres, Pfannmoeller, Martin, Tendeloo, Gustaaf Van, Ballesteros, Belen, Tobias, Gerard, "Selective Laser-Assisted Synthesis of Tubular van der Waals Heterostructures of Single-Layered PbI 2 within Carbon Nanotubes Exhibiting Carrier Photogeneration" in ACS Nano, 12, no. 7 (2018):6648-6656,
https://doi.org/10.1021/acsnano.8b01638 . .

TY  - JOUR
AU  - Cabana, Laura
AU  - Ke, Xiaoxing
AU  - Kepić, Dejan P.
AU  - Oro-Sole, Judith
AU  - Tobias-Rossell, Ester
AU  - Tendeloo, Gustaaf Van
AU  - Tobias, Gerard
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/712
AB  - Purification and shortening of carbon nanotubes have attracted a great deal of attention to increase the biocompatibility and performance of the material in several applications. Steam treatment has been employed to afford both purification and shortening of multi-walled carbon nanotubes (MWCNTs). Steam removes the amorphous carbon and the graphitic particles that sheath catalytic nanoparticles, facilitating their removal by a subsequent acidic wash. The amount of metal impurities can be reduced in this manner below 0.01 wt.%. The length distribution of MWCNTs after different steam treatment times (from 1 h to 15 h) was assessed by box plot analysis of the electron microscopy data. Samples with a median length of 0.57 mu m have been prepared with the reported methodology while preserving the integrity of the tubular wall structure. (C) 2015 Elsevier Ltd. All rights reserved.
T2  - Carbon
T1  - The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes
VL  - 93
SP  - 1059
EP  - 1067
DO  - 10.1016/j.carbon.2015.06.027
ER  - 

@article{
author = "Cabana, Laura and Ke, Xiaoxing and Kepić, Dejan P. and Oro-Sole, Judith and Tobias-Rossell, Ester and Tendeloo, Gustaaf Van and Tobias, Gerard",
year = "2015",
abstract = "Purification and shortening of carbon nanotubes have attracted a great deal of attention to increase the biocompatibility and performance of the material in several applications. Steam treatment has been employed to afford both purification and shortening of multi-walled carbon nanotubes (MWCNTs). Steam removes the amorphous carbon and the graphitic particles that sheath catalytic nanoparticles, facilitating their removal by a subsequent acidic wash. The amount of metal impurities can be reduced in this manner below 0.01 wt.%. The length distribution of MWCNTs after different steam treatment times (from 1 h to 15 h) was assessed by box plot analysis of the electron microscopy data. Samples with a median length of 0.57 mu m have been prepared with the reported methodology while preserving the integrity of the tubular wall structure. (C) 2015 Elsevier Ltd. All rights reserved.",
journal = "Carbon",
title = "The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes",
volume = "93",
pages = "1059-1067",
doi = "10.1016/j.carbon.2015.06.027"
}

Cabana, L., Ke, X., Kepić, D. P., Oro-Sole, J., Tobias-Rossell, E., Tendeloo, G. V.,& Tobias, G.. (2015). The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes. in Carbon, 93, 1059-1067.
https://doi.org/10.1016/j.carbon.2015.06.027

Cabana L, Ke X, Kepić DP, Oro-Sole J, Tobias-Rossell E, Tendeloo GV, Tobias G. The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes. in Carbon. 2015;93:1059-1067.
doi:10.1016/j.carbon.2015.06.027 .

Cabana, Laura, Ke, Xiaoxing, Kepić, Dejan P., Oro-Sole, Judith, Tobias-Rossell, Ester, Tendeloo, Gustaaf Van, Tobias, Gerard, "The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes" in Carbon, 93 (2015):1059-1067,
https://doi.org/10.1016/j.carbon.2015.06.027 . .

TY  - JOUR
AU  - Đoković, Vladimir
AU  - Krsmanović, Radenka
AU  - Božanić, Dušan K.
AU  - McPherson, Michael
AU  - Tendeloo, Gustaaf Van
AU  - Nair, P. Sreekumari
AU  - Georges, Michael K.
AU  - Radhakrishnan, Thottackad
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3760
AB  - Adsorption of sulfide ions onto a surface of starch capped silver nanoparticles upon addition of thioacetamide was investigated. UV-vis absorption spectroscopy revealed that the adsorption of the sulfide ion on the surface of the silver nanoparticles induced damping as well as blue shift of the silver surface plasmon resonance band. Further increase in thioacetamide concentration led to shift of the resonance band toward higher wavelengths indicating the formation of the continuous Ag2S layer on the silver surface. Thus fabricated nanoparticles were investigated using electron microscopy techniques (TEM, HRTEM, and HAADF-STEM) and X-ray photoelectron spectroscopy (XPS), which confirmed their core-shell structure. (C) 2009 Elsevier B.V. All rights reserved.
T2  - Colloids and Surfaces. B: Biointerfaces
T1  - Adsorption of sulfur onto a surface of silver nanoparticles stabilized with sago starch biopolymer
VL  - 73
IS  - 1
SP  - 30
EP  - 35
DO  - 10.1016/j.colsurfb.2009.04.022
ER  - 

@article{
author = "Đoković, Vladimir and Krsmanović, Radenka and Božanić, Dušan K. and McPherson, Michael and Tendeloo, Gustaaf Van and Nair, P. Sreekumari and Georges, Michael K. and Radhakrishnan, Thottackad",
year = "2009",
abstract = "Adsorption of sulfide ions onto a surface of starch capped silver nanoparticles upon addition of thioacetamide was investigated. UV-vis absorption spectroscopy revealed that the adsorption of the sulfide ion on the surface of the silver nanoparticles induced damping as well as blue shift of the silver surface plasmon resonance band. Further increase in thioacetamide concentration led to shift of the resonance band toward higher wavelengths indicating the formation of the continuous Ag2S layer on the silver surface. Thus fabricated nanoparticles were investigated using electron microscopy techniques (TEM, HRTEM, and HAADF-STEM) and X-ray photoelectron spectroscopy (XPS), which confirmed their core-shell structure. (C) 2009 Elsevier B.V. All rights reserved.",
journal = "Colloids and Surfaces. B: Biointerfaces",
title = "Adsorption of sulfur onto a surface of silver nanoparticles stabilized with sago starch biopolymer",
volume = "73",
number = "1",
pages = "30-35",
doi = "10.1016/j.colsurfb.2009.04.022"
}

Đoković, V., Krsmanović, R., Božanić, D. K., McPherson, M., Tendeloo, G. V., Nair, P. S., Georges, M. K.,& Radhakrishnan, T.. (2009). Adsorption of sulfur onto a surface of silver nanoparticles stabilized with sago starch biopolymer. in Colloids and Surfaces. B: Biointerfaces, 73(1), 30-35.
https://doi.org/10.1016/j.colsurfb.2009.04.022

Đoković V, Krsmanović R, Božanić DK, McPherson M, Tendeloo GV, Nair PS, Georges MK, Radhakrishnan T. Adsorption of sulfur onto a surface of silver nanoparticles stabilized with sago starch biopolymer. in Colloids and Surfaces. B: Biointerfaces. 2009;73(1):30-35.
doi:10.1016/j.colsurfb.2009.04.022 .

Đoković, Vladimir, Krsmanović, Radenka, Božanić, Dušan K., McPherson, Michael, Tendeloo, Gustaaf Van, Nair, P. Sreekumari, Georges, Michael K., Radhakrishnan, Thottackad, "Adsorption of sulfur onto a surface of silver nanoparticles stabilized with sago starch biopolymer" in Colloids and Surfaces. B: Biointerfaces, 73, no. 1 (2009):30-35,
https://doi.org/10.1016/j.colsurfb.2009.04.022 . .

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Bals, Sara
AU  - Bertoni, Giovanni
AU  - Tendeloo, Gustaaf Van
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6734
AB  - Particularly favourable properties of glass ceramics are developed on the basis of two key advantages of these materials: the variation of chemical composition and of microstructure. Therefore, detailed structural and chemical information are necessary to get insight in novel glass ceramic materials. We present here two examples of Er-doped Li2O-Al2O3-SiO2, with different quantities of ZrO2, both obtained with sol-gel synthesis. Different transmission electron microscopy techniques: conventional TEM, HRTEM, and EELS are used and the results are compared with those previously obtained with XRD and Rietveld analysis. We also demonstrate the 3D reconstruction, obtained from HAADF-STEM imaging, to determine the morphology of nanosize precipitates in these composites. (c) 2007 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Structural characterization of Er-doped Li2O-Al2O3-SiO2 glass ceramics
VL  - 30
IS  - 7
SP  - 1183
EP  - 1188
DO  - 10.1016/j.optmat.2007.05.045
ER  - 

@article{
author = "Krsmanović, Radenka and Bals, Sara and Bertoni, Giovanni and Tendeloo, Gustaaf Van",
year = "2008",
abstract = "Particularly favourable properties of glass ceramics are developed on the basis of two key advantages of these materials: the variation of chemical composition and of microstructure. Therefore, detailed structural and chemical information are necessary to get insight in novel glass ceramic materials. We present here two examples of Er-doped Li2O-Al2O3-SiO2, with different quantities of ZrO2, both obtained with sol-gel synthesis. Different transmission electron microscopy techniques: conventional TEM, HRTEM, and EELS are used and the results are compared with those previously obtained with XRD and Rietveld analysis. We also demonstrate the 3D reconstruction, obtained from HAADF-STEM imaging, to determine the morphology of nanosize precipitates in these composites. (c) 2007 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Structural characterization of Er-doped Li2O-Al2O3-SiO2 glass ceramics",
volume = "30",
number = "7",
pages = "1183-1188",
doi = "10.1016/j.optmat.2007.05.045"
}

Krsmanović, R., Bals, S., Bertoni, G.,& Tendeloo, G. V.. (2008). Structural characterization of Er-doped Li2O-Al2O3-SiO2 glass ceramics. in Optical Materials, 30(7), 1183-1188.
https://doi.org/10.1016/j.optmat.2007.05.045

Krsmanović R, Bals S, Bertoni G, Tendeloo GV. Structural characterization of Er-doped Li2O-Al2O3-SiO2 glass ceramics. in Optical Materials. 2008;30(7):1183-1188.
doi:10.1016/j.optmat.2007.05.045 .

Krsmanović, Radenka, Bals, Sara, Bertoni, Giovanni, Tendeloo, Gustaaf Van, "Structural characterization of Er-doped Li2O-Al2O3-SiO2 glass ceramics" in Optical Materials, 30, no. 7 (2008):1183-1188,
https://doi.org/10.1016/j.optmat.2007.05.045 . .

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Morozov, V. A.
AU  - Lebedev, O. I.
AU  - Polizzi, S.
AU  - Speghini, A.
AU  - Bettinelli, M.
AU  - Tendeloo, Gustaaf Van
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3228
AB  - Nanocrystalline powders of undoped and lanthanide (Pr3+, Tm3+)- doped gadolinium gallium garnet, Gd3Ga5O12 (GGG), were prepared by propellant synthesis and studied by x-ray powder diffraction (XRD), electron diffraction (ED), high-resolution electron microscopy (HREM) and luminescence spectroscopy. The x-ray diffraction patterns of the GGG samples were analysed using the Rietveld method. The Rietveld refinement reveals the existence of two garnet-type phases: both are cubic (space group Ia $(3) over bar $d) with a slightly different lattice parameter and probably a slightly different composition. Electron diffraction and electron microscopy measurements confirm the x-ray diffraction results. EDX measurements for lanthanide-doped samples show that stable solid solutions with composition Gd(3-x)Ln(x)Ga(5)O(12), x approximate to 0.3 ( Ln = Pr; Tm) have been obtained. The luminescence properties of the Tm3+ -doped nanocrystalline GGG samples were measured and analysed.
T2  - Nanotechnology
T1  - Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis
VL  - 18
IS  - 32
DO  - 10.1088/0957-4484/18/32/325604
ER  - 

@article{
author = "Krsmanović, Radenka and Morozov, V. A. and Lebedev, O. I. and Polizzi, S. and Speghini, A. and Bettinelli, M. and Tendeloo, Gustaaf Van",
year = "2007",
abstract = "Nanocrystalline powders of undoped and lanthanide (Pr3+, Tm3+)- doped gadolinium gallium garnet, Gd3Ga5O12 (GGG), were prepared by propellant synthesis and studied by x-ray powder diffraction (XRD), electron diffraction (ED), high-resolution electron microscopy (HREM) and luminescence spectroscopy. The x-ray diffraction patterns of the GGG samples were analysed using the Rietveld method. The Rietveld refinement reveals the existence of two garnet-type phases: both are cubic (space group Ia $(3) over bar $d) with a slightly different lattice parameter and probably a slightly different composition. Electron diffraction and electron microscopy measurements confirm the x-ray diffraction results. EDX measurements for lanthanide-doped samples show that stable solid solutions with composition Gd(3-x)Ln(x)Ga(5)O(12), x approximate to 0.3 ( Ln = Pr; Tm) have been obtained. The luminescence properties of the Tm3+ -doped nanocrystalline GGG samples were measured and analysed.",
journal = "Nanotechnology",
title = "Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis",
volume = "18",
number = "32",
doi = "10.1088/0957-4484/18/32/325604"
}

Krsmanović, R., Morozov, V. A., Lebedev, O. I., Polizzi, S., Speghini, A., Bettinelli, M.,& Tendeloo, G. V.. (2007). Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis. in Nanotechnology, 18(32).
https://doi.org/10.1088/0957-4484/18/32/325604

Krsmanović R, Morozov VA, Lebedev OI, Polizzi S, Speghini A, Bettinelli M, Tendeloo GV. Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis. in Nanotechnology. 2007;18(32).
doi:10.1088/0957-4484/18/32/325604 .

Krsmanović, Radenka, Morozov, V. A., Lebedev, O. I., Polizzi, S., Speghini, A., Bettinelli, M., Tendeloo, Gustaaf Van, "Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis" in Nanotechnology, 18, no. 32 (2007),
https://doi.org/10.1088/0957-4484/18/32/325604 . .