Metal-organic frameworks (MOFs) are crystalline hybrid framework materials composed of inorganic metal “nodes” bridged by rigid organic linkers, thereby featuring exceptionally high surface areas and porosities. Despite the successful synthesis of a plethora of intricate framework topologies, a major objective in current MOF chemistry is the extension of pore sizes from the micropore (> 2 nm) t...

Silica was extracted from agriculture waste rice husk ash (RHA) and was used as the silica source for synthesis of RMCM-48 and RSBA-16. An alkali fusion process was utilized to separate silicate supernatant and the sediment effectively. The CTAB/Si and F127/Si molar ratio was employed to control the structure properties of the obtained RMCM-48 and RSBA-16 materials. The N2 adsorption-desorption...

Autonomous micromanipulation has been an emerging interest in constructing and assembling microobjects. Manual assembly and manipulation of small-scale objects through teleoperation is possible, however autonomy is necessary for large-volume manipulation and manufacturing. In this study, we discuss a two-dimensional autonomous manipulation system, which is based on an optical microscope and a n...

In this study, conventional concrete is developed using recycled aggregates with micro silica (silica fume) as admixture. The mix designed for target strength of 25 MPa. Coarse aggregate were partially at 15 %, 30 % and 45 %. relative parameters influencing the studied in terms content respectively. Test results reveled produced 45% tend to reduce by 12% whereas addition fume (10%) enhances com...

The potential crosslinking of three types nitrogen-containing functionalized silica (TAAcONa, guanidine, and triamine) with polyacrylamide (PAM) has been investigated. Only triamine was able to crosslink PAM, producing barely flowing gel storage modulus around 700 Pa. Micro differential scanning calorimeter (?DSC) analysis illustrated exothermic peaks indicating PAM polyethyleneimine (PEI), ons...

As nanofluidic channels, uniaxially oriented mesoporous-silica is, for the first time, in-situ self-assembled in a microfluidic chip for quick enrichment/extraction of ng L(-1)(ppt)-level organo-phosphorous (OP) pesticide residue from aqueous solution to ethanol. This micro/nano combined pre-treatment chip is essential for following gas chromatography-mass spectrometry (GC-MS) quantitative anal...

The aim of this paper is to fabricate micro-gears via laser shock punching with Spitlight 2000 Nd-YAG Laser, and to discuss effects of process parameters namely laser energy, soft punch properties and blank-holder on the quality of micro-gears deeply. Results show that dimensional accuracy is the best shocked at 1690 mJ. Tensile fracture instead of shear fracture is the main fracture mode under...

In applying a multi-scale spectroscopic and computational approach, we demonstrate that the synthesis of stacked zeolite silicalite-1 nanosheets, in the presence of a long-tail diquaternary ammonium salt surfactant, proceeds through a pre-organised phase in the condensed state. In situ small-angle X-ray scattering, coupled to paracrystalline theory, and backed by electron microscopy, shows that...

Supported olefin polymerization catalysts can prevent reactor-fouling problems and produce uniform polymer particles. Constrained geometry complexes (CGCs) have less sterically hindered active sites than bis-cyclopentadienyl metallocene catalysts. In the literature, micrometer-sized silica particles were used for supporting CGC catalysts, which might have strong mass transfer limitations. This ...

Abstract A novel method for multi-finishing cellulosic fabrics is based on the consolidation of a thin layer active material containing micro-gels, titanium nanoparticles and silica. The titanium@silica core–shell particles were synthesized characterized their morphological, structural, compositional properties using X-ray diffraction scanning electron microscopy. are approximately 250 nm in si...