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Charge carrier conversion in alkali oxide-incorporated transition metal oxide-containing glasses has been investigated extensively; however, the influences of protons on this phenomenon have not been systematically probed. In this study, we employed electrochemical alkali (Na+)–proton substitution (APS) in an attempt to fabricate a mixed protonic–electr...
Continue readingLow-cost detection systems are needed for the identification of microplastics (MPs) in environmental samples. However, their rapid identification is hindered by the need for complex isolation and pre-treatment methods. This study describes a comprehensive sensing platform to identify MPs in environmental samples without requiring independent separation or pre-tre...
Continue readingA sustainable society requires high-energy storage devices characterized by lightness, compactness, a long life and superior safety, surpassing current battery and supercapacitor technologies. Single-walled carbon nanotubes (SWCNTs), which typically exhibit great toughness, have emerged as promising candidates for innovative energy storage solutions. Here we prod...
Continue readingGadolinium hydroxide (Gd(OH)3) was synthesized via a microwave-assisted synthesis method. Nickel ion (Ni2+) was doped into Gd(OH)3, in which 4–12% Ni-Gd(OH)3 was synthesized, to study the effect of doping. The structural, optical, and morphological properties of the synthesized materials were analyzed. The crystallite sizes of the hexagonal structure of Gd(...
Continue readingPolycrystalline Ge thin films have attracted considerable attention as potential materials for use in various electronic and optical devices. We recently developed a low-temperature solid-phase crystallization technology for a doped Ge layer and achieved the highest electron mobility in a polycrystalline Ge thin film. In this study, we investigated the effects of...
Continue readingThe reaction mechanism of steam reforming of cyclohexane as a model compound of tar on Ni/SBA-15 and Ni–Mn/SBA-15 catalysts was investigated by the transient technique and temperature-programmed reduction method. These catalysts were prepared by the impregnation of SBA-15 with an ethylene glycol-containing metal precursor and characterized by transmission ele...
Continue readingIn anti-cancer metastasis treatment, precise drug delivery to cancer cells remains a challenge. Innovative nanocomposites are developed to tackle these issues effectively. The approach involves the creation of manganese oxide (Mn3O4) nanoparticles (NPs) and their functionalization using trisodium citrate to yield functionalized Mn3O4 NPs (F-Mn3O4 NPs), with enhan...
Continue readingTo investigate the mechanisms of interactions between a hydrophobic polymer and water, molecular dynamics calculations and Raman spectroscopic measurements of cis-1,4-polyisoprene (PI)-water systems were performed. The results show that PI in water undergoes a coil–globule transition at around 248 K. The transition is attributed to changes in the density and ...
Continue readingA novel laser-induced graphene (LIG) resistive relative humidity (RH) sensor is successfully fabricated by direct laser writing on a common natural cork sheet. In this work, a straightforward fabrication is presented where LIG, porous multilayer graphene, is generated by a laser photothermal process on a carbon-based substrate, in this case, an agglomerate cork she...
Continue readingDeveloping efficient and stable carbon nanotube (CNT) doping techniques and elucidating their chemistry is essential for their further implementation in electronic and energy devices. Here, protonic acids and lithium salts are employed as p-type inducers and stabilizers of the doped state, respectively. Leveraging the electron-withdrawing capability of protons, p...
Continue readingAlkali metal (AM) intercalation between graphene layers holds promise for electronic manipulation and energy storage, yet the underlying mechanism remains challenging to fully comprehend despite extensive research. In this study, we employ low-voltage scanning transmission electron microscopy (LV-STEM) to visualize the atomic structure of intercalated AMs (potass...
Continue readingFractal-like geometries applied to biosignal-electrodes design show great potential for enhancing the signal acquisition of sensing systems. This study reports a novel approach for flexible, silver-free, and dry fractal-like electrodes based on Laser-Induced Graphene (LIG) obtained through laser photothermal processing of a commercial polyimide film. This one-step ...
Continue readingThe development of artificial spider silk with properties similar to native silk has been a challenging task in materials science. In this study, we use a microfluidic device to create continuous fibers based on recombinant MaSp2 spidroin. The strategy incorporates ion-induced liquid-liquid phase separation, pH-driven fibrillation, and shear-dependent induction o...
Continue readingThe limited performance of piezoelectric nanogenerators (PENGs) has hindered their practical applications in self-powered electronics. To address these limitations, this study presents a new design of a PENG that incorporates hetero-layer structured piezo-composite nanofibers with interspaced metal sheets. The hetero-layer structure consists of alternating layers...
Continue readingTwist angle between two-dimensional layers is a critical parameter that determines their interfacial properties, such as moiré excitons and interfacial ferro-electricity. To achieve better control over these properties for fundamental studies and various applications, considerable efforts have been made to manipulate twist angle. However, due to mechanical...
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