Naoki Tarutani

Hiroshima University | HU · Department of Applied Chemistry

Minimally invasive boron neutron capture therapy (BNCT) is one of the elegant approaches for cancer treatment. The deliverability of boron agents to cancer cells with high selectivity and efficiency is the key to maximizing the therapeutic benefits of BNCT. In addition, the enhancement of the frequencies to achieve a boron neutron capture reaction...

Boron neutron capture therapy shows is a promising approach to cancer therapy, but the delivery of effective boron agents is challenging. To address the requirements for efficient boron delivery, we used a hybrid nanoparticle comprising a carborane = bearing pullulan nanogel and hydrophobized boron oxide nanoparticle (HBNGs) enabling the preparatio...

ZnO rod film is a promising material for electrodes and sensors due to its large surface area and high electrical conductivity. One of the drawbacks of conventional ZnO rod film is the random orientation of rods. In this study, an oriented ZnO seed layer composed of hexagonal plate-like ZnO particles was prepared by dip-coating. An oriented ZnO rod...

Two-dimensional materials modified with low molecular weight species are known to show unique electronic properties. In this study, we focus on the synthesis and electrochemical investigation of metal hydroxide salt monolayer nanoparticles modified with different molecules toward improved electrochemical functions. Nickel hydroxide carboxylate nano...

Structurally colored materials consisting of arrays of submicrometer-sized particles have drawn a great deal of attention because of their advantages, including low cost, low impact on human health as well as the environment, and resistance to fading. However, their low thermal stability is considered to be a critical issue for their practical use...

The ordering of monodispersed nano- and micro-scale particles has unique properties, such as selective light scattering, which are controlled by the degree of ordering. In structurally colored materials, particle arrays that have long-range-order (colloidal crystalline arrays) can exhibit vivid and illumination-angle-dependent color. In contrast, s...

Solid solutions of strontium-tantalum oxynitride perovskite (SrTaO2N) and strontium-titanium oxide perovskite (SrTiO3) were prepared as possible candidates for novel inorganic pigments. The use of Ta-Ti binary oxide gel, which was obtained by the sol–gel method, was conducive to the development of single-phase solid solutions with a homogeneous ato...

Developing photoactivatable theranostic platforms with integrated functionalities of biocompatibility, targeting, imaging contrast, and therapy is a promising approach for cancer diagnosis and therapy. Here, we report a theranostic agent based on a hybrid nanoparticle comprising fullerene nanocrystals and gold nanoparticles (FGNPs) for photoacousti...

Calcium–tantalum based perovskite oxynitrides were successfully prepared without ammonolysis. The colour of La ³⁺ -doped CaTa(O,N) 3 was comparable to that of CaTaO 2 N prepared by ammonolysis and inorganic yellow pigments using heavy metals.

Hollow structures possess a confinement function, which enables the handling and use of functional liquids. In this study, we focus on the confinement of water in the inner spaces of hollow SiO2 nanoparticles (HSNPs). Water is introduced into the hollow spaces after passing through the mesopores of the shells. The introduced water is then confined...

Semiconductor photocatalysts showing excellent performance under irradiation of both ultraviolet (UV)- and visible (VIS)-light are highly demanded towards realization of sustainable energy systems. TiO2 is one of the most common photocatalysts and has been widely investigated as candidate showing UV/VIS responsive performance. In this study, we rep...

The use of organic-inorganic hybrid nanoparticles will enable a control of the characteristics of both the nanoparticles and constructed fine structures. In this study, we report the synthesis of acrylate-intercalated layered manganese, cobalt, and nickel hydroxide nanoparticles and their assembly into ordered mesoporous structures. Polymerization...

The use of precrystallized nanoparticles as nanobuilding blocks (NBBs) is a promising way to obtain mesoporous materials with crystalline walls. In this study, the size effects of both hydroxide NBBs and nonionic block copolymer (BCP) templates on the formation of ordered mesostructures are investigated. The diameter of layered nickel hydroxide NBB...

A facile method was successfully developed to prepare strontium-tantalum perovskite oxynitride, SrTaO2N, and its solid solutions. Urea was employed as a solid nitriding agent to eliminate the use of toxic NH3 gas. In addition, utilization of sol-gel-derived Ta2O5 gel as a Ta precursor allowed for completion of nitridation within a shorter period an...

Nanocrystal-based processing has attracted significant interest for the fabrication of highly functional materials with controlled crystallinity and fine porous structures. In this study, we focused on the template-free synthesis of nanocrystal-based materials with size-tailored pores using layered nickel hydroxide intercalated with acrylate anions...

Structurally colored coatings composed of colloidal arrays of monodisperse spherical particles have attracted great attention owing to their versatile advantages, such as low cost, resistance to fading, and low impacts on the environment and human health. However, the weak mechanical stability is considered to be a major obstacle for their practica...

Nano-size EVONIK AEROXIDE ® P25 titanium dioxide, TiO 2 , powder was heat-treated at temperatures, 700–900°C, in air. An X-ray diffraction study showed that the P25 powder is composed of approximately 20 and approximately 80 mass% of rutile and anatase phases, respectively. It was also shown that the transformation from anatase to rutile induced by...

The ultimate control of the interfaces of nanocomposite materials is essential to tailor and improve their physical/chemical properties in applications such as catalysis, or energy storage or production. Fabrication and co-assembly of a variety of nanostructured colloids is a promising way to design the interface of materials in nano-scale toward h...

Structural control in micro- and nanometer scales is necessary to design highly functional materials. Crystalline mesoporous microspheres (MMSs) are expected to improve electrochemical, catalytic, and adsorption performances. In this study, we focused on the preparation of templated MMSs of nickel-based layered hydroxides by using pre-crystallized...

Mesoporous crystalline (hydr)oxides of low-valence metal ions (M(II) and M(III)) are highly demanded in the context of various applications. In this study, we demonstrate key factors to the successful formation of ordered mesoporous films through the Assembly of Nano-Building Block (ANBB) approach using a colloidal solution of crystalline M(OH)2 (M...

Hierarchically porous biocompatible Mg-Al-Cl type LDH composites containing aluminum hydroxide (Alhy) have been prepared using a phase-separation process. The sol-gel synthesis allows for the hierarchical pores of the LDH-Alhy composites to be tuned, leading to a high specific solid surface area per unit volume available for high molecular weight p...

Metal oxides of low-valence metal cations (M(II) and M(III); M = Al, Cr, Mn, Fe, Co, Ni, Cu, etc.) are essential in catalysis, sustainable energy, information technology, and environmental applications. In addition, the corresponding metal hydroxides present a 2D crystalline structure of hydroxide layers and interlayer anions and have attracted att...

Increasing attention has been dedicated to the development of nanomaterials rendering green and sustainable processes, which avail in benign aqueous reaction media. Herein, we demonstrate the synthesis of a novel family of green nanomaterials, layered double hydroxide (LDH) nanoclusters, which are concentrated (98.7 g/L in aqueous solvent), stably-...

Removal of toxic substances from industrial wastes is an urgent issue for realizing a sustainable society. Layered double hydroxides (LDHs) are expected to be an effective adsorbent for toxic anions, especially oxyanions, because of their high anion adsorption capacity and reusability. Monolithic LDH materials with rational meso- and macropores are...

Hierarchically porous layered double hydroxide (LDH) materials have potential in anion-exchange, adsorption and catalysis applications, because of their large surface areas and liquid transportation capabilities. The preparation of monolithic LDH-Al(OH)3 composites with hierarchical μm and nm-scale channels and their adsorption behavior is reported...

Anthracene-doped polyphenylsiloxane (PPS) glass containing silver nanoparticles (AgNPs) of appropriate size was synthesized in a form of solid thin films for modifying light emission characteristics. The photoluminescence (PL) emission from the anthracene molecules at ∼2.95 eV was resonantly coupled to the localized surface plasmon (LSP) polariton...

Monolithic layered double hydroxides (LDHs) with interconnected channels have been expected to enhance sorption rate as well as increase accumulation of anions. Although powder molding can form easily-handled LDH compacts, interconnected channel formation therein has not been achieved. Herein, we demonstrate cm-scale monolithic LDH-based composites...