2014/12/02 13:15
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NanoBrook产品应用-12-ZetaPALS
文献名: Structural, morphological and optical properties of Bi NPs obtained by laser ablation and their selective detection of L-cysteine 作者: Ramon Gabriel Teixeira Rosaa, Celso de Araujo Duartea , Wido Herwig Schreinera, Ney Pereira Mattoso Filhoa, Arandi Ginane Bezerra Jr.b, Andersson Barisonc, Fernanda Maria Marins Ocamposc a Departamento de Física, Universidade Federal do Paraná Centro Politécnico, CP 19044, 81531-990 Curitiba (PR), Brazil b Departamento Acadêmico de Física, Universidade Tecnológica Federal do Paraná, 80230-901 Curitiba (PR), Brazil c Departamento de Química, Universidade Federal do Paraná Centro Politécnico, CP 19081, 81531-990 Curitiba (PR), Brazil 摘要:In the present work we show the results of the investigation of the properties of bismuth nanoparticles (NPs) obtained by the laser ablation in water. The samples were characterized by various techniques: UV/vis spectroscopy, dynamic light scattering, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, nuclear magnetic resonance and zeta potential. The NPs were metallic and surface oxidated, exhibiting absorption peak at 257 nm due to the surface plasmon resonance. The interaction between the NPs and various amino acids was studied and revealed a selective sensibility to cysteine on a range of concentration from 80 to 720 μM, which we attribute to a dimerization of cysteine to cystine probably complexed to the nanoparticle surface by electrostatic interactions, leading to the modification of the NP absorption spectrum. 关键词:Bismuth; Nanoparticles; Laser ablation; Cysteine
2015/04/16
双相不锈钢的增强纳米压痕应用
Using Bruker’s Hysitron PI 88 SEM PicoIndenter equipped with tilt and rotation stages in conjunction with the QUANTAX EBSD system enables a more robust characterization of metallic materials by combining high resolution phase and grain orientation mapping capabilities with targeted nanomechanical property measurements. This combination could also be used to extend the scope of research related to other advanced textured, anisotropic, or multi-phase materials.
钢铁/金属
2021/09/02
宝德仪器助力新版《生活饮用水卫生标准》(GB5749-2022)
2022年3月15日,国家市场监督管理总局(国家标准化管理委员会)批准了新版《生活饮用水卫生标准》(GB5749-2022),该标准将于2023年4月1日起正式施行,全部代替现行的GB5749-2006。在新版国家标准中水质指标由原来的106项调整为97项,包括常规指标43项和扩展指标54项;水质参考指标由原来的28项调整为55项。北京宝德仪器有限公司现有产品可帮助用户解决14项常规指标、4项扩展指标和4项水质参考指标的测定。
环保
2022/03/30
导致超纯水机性能下降的因素有哪些?
超纯水机在后期使用中会因各种因素导致设备性能下降,所以为了确保延长设备的使用寿命,日常使用时就应该注意设备的维护和保养,那么导致超纯水机性能下降的因素有哪些呢?
制药/生物制药
2022/06/09