3,354 research outputs found
Microfabrication of mesoporous silica encapsulated enzymes using deep X-ray lithography
No full textA bottom-up enzyme encapsulation technique on mesoporous silica together with top-down deep X-ray lithography provides a novel fabrication method for producing bioactive mesoporous patterned substrates for potential use as a biosensing platform. This precise, spatially controllable functionalisation technique is promising for micro-fluidic or lab-on-a-chip type devices.Cara M. Doherty, Yuan Gao, Benedetta Marmiroli, Heinz Amenitsch, Fabio Lisi, Luca Malfatti, Kenji Okada, Masahide Takahashi, Anita J. Hill, Plinio Innocenzi and Paolo Falcar
Top-down patterning of Zeolitic Imidazolate Framework composite thin films by deep X-ray lithography
No full textFor the first time a top-down process was used to control the spatial location of Metal–Organic Frameworks on a surface. Deep X-ray lithography was utilised to micropattern a Zeolitic Imidazolate Framework layer on a sol–gel surface, with exposure hardening the sol–gel by inducing crosslinking while leaving the frameworks intact.Constantinos Dimitrakakis, Benedetta Marmiroli, Heinz Amenitsch, Luca Malfatti, Plinio Innocenzi, Gianluca Grenci, Lisa Vaccari, Anita J. Hill, Bradley P. Ladewig, Matthew R. Hill, Paolo Falcar
Sol–gel chemistry: from self-assembly to complex materials
No full text"Sol–gel appears nowadays as a mature branch. of chemistry with much of the basic research that has been. exploited for the most part. The possibility of combining. sol–gel with supramolecular chemistry has, however, open. almost endless possibilities of new applications of sol–gel. processes which have therefore become a fundamental tool. of nano-chemistry. We have briefly reviewed the work. done in our laboratory in this field, from self-assembly,. with a description of the analytical in situ techniques that. we have developed up to the design of nanomaterials of. increasing complexity.
Sol-Gel Chemistry for Carbon Dots
No full textCarbon dots are an emerging class of carbon-based nanostructures produced by low-cost raw materials which exhibit a widely-tunable photoluminescence and a high quantum yield. The potential of these nanomaterials as a substitute of semiconductor quantum dots in optoelectronics and biomedicine is very high, however they need a customized chemistry to be integrated in host-guest systems or functionalized in core-shell structures. This review is focused on recent advances of the sol-gel chemistry applied to the C-dots technology. The surface modification, the fine tailoring of the chemical composition and the embedding into a complex nanostructured material are the main targets of combining sol-gel processing with C-dots chemistry. In addition, the synergistic effect of the sol-gel precursor combined with the C-dots contribute to modify the intrinsic chemo-physical properties of the dots, empowering the emission efficiency or enabling the tuning of the photoluminescence over a wide range of the visible spectrum
Mesoporous Thin Films: Properties and Applications
No full text"In this review we present a short overview of the main fields of application of mesoporous ordered. films obtained via templating self-assembly. These materials, because of their very special properties. such as high surface area, ordered porosity, versatile functionalization of the pore surface, have been. widely used for developing advanced functional applications. Mesoporous ordered films have also. shown a high capability of integration in current material processing technologies also taking. advantage of the high flexibility of the synthesis. A surprisingly large variety of devices and applications. have been developed so far which ranges from sensors to supercapacitors and biodevices. All these. applications have in common the exploitation of ordered porosity on the mesoscale and in general a. strong dependence on pore topology, the nature of the pore surface and pore accessibility has been. demonstrated for most of the cases. Even if a high number of examples of applications have been. reported still many more are expected to come in the near future.
Il bilancio delle società calcistiche quotate: analisi di serie storiche ed aspetti peculiari
No full textNanoparticles in mesoporous films, a happy marriage for materials science
No full textMesoporous ordered materials, whose porosity is within the 2–50-nm range, are an ideal host for functional nanoparticles. Mesoporous thin films, in particular, offer a large variety of options for the fabrication of advanced materials and devices based on the host-guest combination of matrix nanoparticles. Nanocomposite mesoporous films embedding metal, oxide, and semiconductor nanoparticles have been prepared using as matrix oxides, mixed oxides, and organic-inorganic hybrids. The organization of the pores is an important peculiar property of mesoporous ordered films and allows producing nanocomposites whose nanoparticles follow a very specific array within the material. The main synthesis methods to obtain mesostructured films containing nanoparticles, together with their applications, are briefly introduced in the present review
A leptin sandwich ELISA kit unusable for domestic animals
No full textAn instance of hormone assay method flaw is reported. In this journal Chronobiology International,
two papers appeared in which an ELISA method for human serum or plasma was utilized for blood
serum of horse and sheep, respectively. From our testing, it is resulted that such method does not
work at all for equine, sheep and other animal species. The use of commercial hormone assay kits
for heterologous species always needs a careful validation procedure. First, the same hormone
molecule by different species could not share enough homology to be regognized by and react
with antibodies utilized in the method. Furthermore, even with a full overlap of the molecules,
possible interferences by other components of the sample (matrix effect) have to be considered
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