We present a new generation of piezoresistive nanomechanical Membrane-type Surface stress Sensor (MSS) chips, which consist two dimensional array MSS on single chip. The implementation several optimization techniques in the design and microfabrication improved sensitivity by 3~4 times compared to first chip, resulting about ~100 better than standard cantilever-type sensor few optical read-out methods terms experimental signal-to-noise ratio. Since integrated can meet practical requirements,...

The development of novel functional nanomaterials is critically important for the further evolution advanced chemical sensor technology. For this purpose, metalloporphyrins offer unique binding properties as host molecules that can be tailored at synthetic level and potentially improved by incorporation into inorganic materials. In work, we present a hybrid nanosystem based on highly networked silica nanoarchitecture conjugated through covalent bonding to an organic molecule,...

To clarify hydroxyapatite (HAp) nanocrystal formation based on the interfacial interactions with organic molecules is important for controlling dispersion states/shapes of HAp and understanding biomineralization mechanism. In this study, effects cetyltrimethylammonium bromide (CTAB) micelles process were investigated through both morphosynthesis technique molecular orbital calculations. The nanocrystals synthesized in presence CTAB exhibited a controlled rod-like shape subsequently grew up...

Nanomechanical sensors have gained significant attention as promising platforms for artificial olfaction. Since sorption kinetic parameters that can be estimated from the sensing signals of nanomechanical reflect chemical and physicochemical interactions between odorant receptor material, utilized direct discrimination each odorant. In this study, we demonstrated 20 vapors, including hydrocarbons, alcohols, organic acids, ketones, aldehydes, which are reported human body odor components,...

Abstract Smells are known to be composed of thousands chemicals with various concentrations, and thus, the extraction specific information from such a complex system is still challenging. Herein, we report for first time that nanomechanical sensing combined machine learning realizes extraction, e . g alcohol content quantification as proof-of-concept, smells liquors. A newly developed sensor platform, Membrane-type Surface stress Sensor (MSS), was utilized. Each MSS channel coated functional...

A sensing signal obtained by measuring an odor usually contains varied information that reflects origin of the itself, while effective approach is required to reasonably analyze informative data derive desired information. Herein, we demonstrate quantitative analysis was achieved through systematic material design-based nanomechanical combined with machine learning. ternary mixture consisting water, ethanol, and methanol selected as a model system where target molecule coexists structurally...

A membrane-type surface stress sensor (MSS) featuring metal–organic framework nanoparticles shows rapid, discriminative and ppm-level responses to volatile organic compounds.

Abstract Artificial olfaction, that is, a chemical sensor system identifies samples by smell, has not been fully achieved because of the complex perceptional mechanism olfaction. To realize an artificial olfactory system, only array sensors but also valid feature extraction method is required. In this study, we identification spices smell using nanomechanical membrane-type surface stress (MSS). Features were extracted from sensing signals obtained four MSS coated with different types...

Graphene is a key material for gas sensing applications owing to its high specific surface area and vast chemical modification potential. To fully utilize the potential of graphene, platform independent conductive properties required. In this study, we employed membrane-type stress sensors (MSS)—A kind nanomechanical sensor operated in static mode—As utilized graphene oxide (GO) as material. MSS detect caused by sorption; therefore, chemically modified with low conductivity can be We...

Abstract We successfully fabricated a novel sensing platform, Membrane-type Surface stress Sensor (MSS) coated with copper(I) complex bearing phen and BINAP ligands, [Cu(phen)((±)-BINAP)]PF6 (1, = 1,10-phenanthroline, 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl), for specific molecular sensing. Based on the transduction of mechanical stresses derived from sorption-induced deformation Cu(I) complex, detection performance various volatile organic compounds (VOCs) has been investigated. The...

For olfactory sensors, clear differentiation of complex odour samples requires diverse information. To obtain such information, hardware modifications, as introducing additional channels with different physical/chemical properties, are usually needed. In this study, we present a new approach to augmenting the sensing signals an sensor by modulating flow rate carrier gas. The headspace vapour odours is measured using system nanomechanical (Membrane-type Surface stress Sensor, MSS). resulting...

Well-defined functional hybrid nanoparticles composed of silica and titania are prepared by means a novel multistep nucleation-controlled growth (<italic>m</italic>NCG) method.

Porphyrin is one of the most promising materials for realizing a practical artificial olfactory sensor system. In this study, we focus on non-substituted porphyrins—porphines—as receptor nanomechanical membrane-type surface stress sensors (MSS) to investigate effect center metals gas sensing. By omitting substituents tetrapyrrole macrocycle porphyrin, peripheral interference by can be avoided. Zinc, nickel, and iron were chosen as these metalloporphines show different properties compared...

Gas identification is one of the most important functions gas sensor systems. To identify species from sensing signals, however, input patterns (e.g. flow sequence) must be controlled or monitored precisely with additional instruments such as pumps mass controllers; otherwise, effective signal features for analysis are difficult to extracted. Toward a compact and easy-to-use system that can species, it necessary overcome restrictions on patterns. Here we develop novel protocol applicable...

Monodispersed titanium dioxide-octadecylamine hybrid spherical particles (particle size of 470 nm and coefficient variation 5.0%), which were subsequently converted to be nanoporous, successfully synthesized by the microfluidic reaction tetraisopropoxide octadecylamine.

This review highlights the current status on synthesis and applications of mesoporous silica spherical particles. Mesoporous particles are expected to be applied in various fields properties depend size distribution. Many researchers have been working by means several approaches a variety synthetic parameters correlated nature products. The categorized into following four; emulsion based approach, formation from homogeneous solution, aerosol morphology template. In this review, preparation...

Structurally similar odorous molecules can be discriminated based on their chemical properties with reduced influence of concentrations in a wide range from ppm to ppb levels by pattern recognition method using nanomechanical sensor.

Composites between carbon fibers (CFs) and heterogeneous materials have been widely studied their fabrication techniques developed. However, hydrophobic surfaces make it difficult to disperse CFs into hydrophilic resins, which results in weak junctions with ceramics. To develop high-strength composite fibers, is important design interfacial chemical bonds. Thus, surface-modification of recently become the main focus interfaces characterized by various analytical methods. In this Minireview,...

Well-defined 200 nm size titania–silica (Si/Ti atomic ratio of 0.19–1.5) spherical particles containing octadecylamine (ODA) were prepared by the hydrolysis and co-condensation titanium tetraisopropoxide tetraethoxysilane in presence ODA. ODA was extracted from using acidic ethanol to obtain nanoporous particles. The calcined at 800 °C for 1 h composed anatase crystallites amorphous silica. Depending on Si/Ti ratio, varied: 10 0.19 2 those 1.5. efficiency photocatalytic decomposition...

Nanomechanical sensors—emerging chemical sensors which detect changes in mechanical properties caused by gas sorption—have been attracting much attention owing to their high sensitivity and versatility. In the data analysis of sensing signals, empirically extracted signal features have commonly employed identify species. Such an empiric approach cannot be optimized further without a solid guideline, resulting limited identification performance. Therefore, new analytical protocol based on...