@article{BalderasValadezAntunezOliveMendezetal.2017, author = {Balderas-Valadez, Ruth Fabiola and Antunez, E. E. and Olive-Mendez, Sion Federico and Pacholski, Claudia and Campos-Alvarez, Jose and Bokhimi, Xim and Agarwal, V.}, title = {Porous silicon pillar and bilayer structure as a nucleation center for the formation of aligned vanadium pentoxide nanorods}, series = {Ceramics International}, volume = {43}, journal = {Ceramics International}, publisher = {Elsevier}, address = {Oxford}, issn = {0272-8842}, doi = {10.1016/j.ceramint.2017.03.114}, pages = {8023 -- 8030}, year = {2017}, abstract = {Porous silicon single layer (PSM), bilayer (PSB) and pillar (PSP) structures have been evaluated as nucleation centers for vanadium pentoxide (V2O5) crystals. Deposition of vanadium precursor over different substrates (drop casting technique), followed by annealing treatment under Ar-H-2 (5\% H-2) atmosphere, induced crystallization of vanadium oxide. With respect to c-Si/SiO2 substrate, V2O5 nanorods with relatively large aspect ratio were formed over and within PSP structures. On the other hand, pores in PSM and PSB were found to be filled with relatively smaller crystals. Additionally, PSB provided a nucleation substrate capable to align the nanocrystals in a preferential orientation, while V2O5 crystals grown on PSP were found to be randomly aligned around the nanoporous pillar microstructure. Nanorods and nanocrystals were identified as V2O5 by temperature-controlled XRD measurements and evidence of their crystalline nature was observed via transmission electron microscopy. A careful analysis of electronic microscopy images allows the identification of the facets composing the ends of the crystals and its corresponding surface free energy has been evaluated employing the Wulff theorem. Such high surface area composite structures have potential applications as cathode material in Lithium-ion batteries.}, language = {en} } @article{SarhanElNagarAbouserieetal.2019, author = {Sarhan, Radwan Mohamed and El-Nagar, Gumaa A. and Abouserie, Ahed and Roth, Christina}, title = {Silver-Iron Hierarchical Microflowers for Highly Efficient H2O2 Nonenzymatic Amperometric Detection}, series = {ACS sustainable chemistry \& engineering}, volume = {7}, journal = {ACS sustainable chemistry \& engineering}, number = {4}, publisher = {American Chemical Society}, address = {Washington}, issn = {2168-0485}, doi = {10.1021/acssuschemeng.8b06182}, pages = {4335 -- 4342}, year = {2019}, abstract = {This study addresses the fabrication of monodispersed iron-doped silver meso-hierarchical flower-like structures via a facile chemical procedure. The morphology of the obtained silver particles has been tuned by changing the concentration of the structure-directing agent (malonic acid). Ball-shaped silver particles were formed in the absence of malonic acid (MA), while silver particles with craspedia-globosa, chrysanthemum, and dahlia flower-like structures were obtained in the presence of 0.2, 0.5, and 1 mM malonic acid, respectively. The doping of these dahlia flower-like structures with trace amounts of iron (<= 5\% Fe weight percent) led to the formation of globe-amaranth iron-doped microflowers (AgFeamaranth). The as-prepared AgFeamaranth exhibited better performance as a nonenzymatic H2O2 sensor compared to undoped silver particles as demonstrated by their higher catalytic activity and stability together with superior sensitivity (1350 mu M-1 cm(-2), 61 times higher) and lower detection limit (0.1 mu M). These enhancements are attributed to the AgFe unique flower-like structures and to the fact that the iron dopants provide a higher number of electroactive sites and reduce the charge transfer resistance of H2O2 reduction. Additionally, the good stability of AgFe is believed to originate from the faster detachment rate of the in situ-formed gas bubbles from their surfaces compared to undoped silver structures.}, language = {en} } @misc{AbouserieSchildeTaubert2018, author = {Abouserie, Ahed and Schilde, Uwe and Taubert, Andreas}, title = {The crystal structure of N-butylpyridinium bis(μ2-dichlorido)-tetrachloridodicopper(II), C₁₈H₂₈N₂Cu₂Cl₆}, series = {Zeitschrift f{\"u}r Kristallographie - New Crystal Structures}, journal = {Zeitschrift f{\"u}r Kristallographie - New Crystal Structures}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-417310}, pages = {4}, year = {2018}, abstract = {C₉H₁₄Cl₃CuN, monoclinic, P2₁/n (no. 14), a = 9.6625(6) {\AA}, b = 9.3486(3) {\AA}, c = 14.1168(8) {\AA}, β = 102.288(5)°, V = 1245.97(11) {\AA}³, Z = 4, Rgₜ(F) = 0.0182, wRᵣₑf(F²) = 0.0499, T = 210(2) K.}, language = {en} } @article{AbouserieSchildeTaubert2018, author = {Abouserie, Ahed and Schilde, Uwe and Taubert, Andreas}, title = {The crystal structure of N-butylpyridinium bis(μ2-dichlorido)-tetrachloridodicopper(II), C₁₈H₂₈N₂Cu₂Cl₆}, series = {Zeitschrift f{\"u}r Kristallographie - New Crystal Structures}, volume = {233}, journal = {Zeitschrift f{\"u}r Kristallographie - New Crystal Structures}, number = {4}, publisher = {de Gruyter}, address = {Berlin und M{\"u}nchen}, issn = {2194-4946}, doi = {10.1515/NCRS-2018-0099}, pages = {743 -- 746}, year = {2018}, abstract = {C₉H₁₄Cl₃CuN, monoclinic, P2₁/n (no. 14), a = 9.6625(6) {\AA}, b = 9.3486(3) {\AA}, c = 14.1168(8) {\AA}, β = 102.288(5)°, V = 1245.97(11) {\AA}³, Z = 4, Rgₜ(F) = 0.0182, wRᵣₑf(F²) = 0.0499, T = 210(2) K.}, language = {en} }