A5037588663- Advanced Chemical Physics Studies
- Photochromic and Fluorescence Chemistry
- Spectroscopy and Quantum Chemical Studies
- Photochemistry and Electron Transfer Studies
- Photopolymerization techniques and applications
- Plasma Diagnostics and Applications
- Surfactants and Colloidal Systems
- Semiconductor materials and devices
- Advanced Polymer Synthesis and Characterization
- Dyeing and Modifying Textile Fibers
- Laser-Matter Interactions and Applications
- Characterization and Applications of Magnetic Nanoparticles
- Nanoparticle-Based Drug Delivery
- Analytical Chemistry and Sensors
- Nanofabrication and Lithography Techniques
- Microfluidic and Bio-sensing Technologies
- Advanced Drug Delivery Systems
- Integrated Circuits and Semiconductor Failure Analysis
- Molecular Spectroscopy and Structure
- Silicon Nanostructures and Photoluminescence
- Diatoms and Algae Research
- Opioid Use Disorder Treatment
- Skin Protection and Aging
- Plasma Applications and Diagnostics
- Optical Coherence Tomography Applications
The University of Tokyo
2021-2025
Tokyo University of the Arts
2021
Hitachi (Japan)
2005-2017
Chuo University
2013
Seikei University
2002
Women Medical College
1997
National Defense Medical College
1984-1989
NEC (Japan)
1989
University of Utah
1987
Waseda University
1977-1982
We formulate frequency fluctuations of intramolecular vibrations a solute by exploring the fluctuation electrostatic potential solvents. present numerical methodology for estimating fluctuations; is based on reference interaction site model self-consistent field with constrained spatial electron density distribution, theoretical solvation fields classical statistic mechanics. By applying theory to C–N stretching several nitrile compounds, our estimated scale and bandwidth shift changing...
The 193nm photoresist (ArF resist) degradation mechanism in dielectric etching was investigated by using an ultra-high-frequency electron-cyclotron-resonance plasma. This investigation focused on via-hole etching. It found that the bottom-antireflection coating (BARC) condition is a critical factor reduction of striation and pitting after X-ray photoelectron spectroscopy scanning electron studies revealed argon-less low-incident-ion-energy conditions BARC can keep resist surface smooth...
Photochromic polymers containing p-phenylazoacrylanilide were synthesized and the photo-induced hydrophobicity change on surface of polymer film was studied by measuring water wettability. The wettability increased with UV irradiation returned to original value visible light irradiation. This reversible in considered be caused large dipole moment across azo bonds due isomerization dye from trans cis form. Furthermore, photoresponsive polymeric adsorbent prepared having adsorption behavior a...
Lagrangians of the state-averaged multiconfigurational self-consistent field (SA-MCSCF) and multistate extended second-order quasidegenerate perturbation theory (MS-XMCQDPT2) coupled with reference interaction site model constraint spatial electron density are defined. In addition, variational equations were derived to calculate excitation energies target molecules dissolved in various solvents. The was applied a phenol molecule solutions, gradients Hessian matrices calculated evaluate...
The demand for precisely controlled etching is increasing as semiconductor device geometries continue to shrink. To fulfill this demand, cyclic atomic level/layer will become one of the key technologies in manufacturing at nanometer dimensions. This review describes recent trends devices and some latest results on atomic-level etching. In particular, it focuses two types that use different heating procedures: infrared irradiation isotropic Ar+ ion bombardment anisotropic It how an...
Quasicontinuous blood glucose monitoring has been achieved by applying an ISFET (ion sensitive field effect transistor) biosensor to transcutaneous effusion fluid. The fluid, collected through the skin evacuation without harm a living creature, contains same and urea concentration as that in serum (1). main advantage of using is its application small volume samples; for example, only about 0.4 μl/min under 400 torr suction, was extracted from 1 cm2 surface rabbit experiment. biosensor, which...
We quantified and subsequently analyzed bandwidth of ultraviolet visible photoabsorption spectral lines in solution by applying time-dependent first-order perturbation theory using the Born–Oppenheimer adiabatic potential calculated multistate extended-multi-configurational quasi-degenerated second-order (MS-XMCQDPT2) coupled with reference interaction site model self-consistent field spatial electron density distribution (RISM-SCF-cSED). The proposed method was implemented for...
光感応性の高分子吸着体を設計するための基礎的知見を得る日的で, アゾ色素 (PPAn) やスピロピラン (ASP) を側鎖に有する高分子を合成し, そのフィルム上での水に対するぬれ測定から光によるフォトクロミックポリマーの疎水性変化を検討した. アゾ色素系高分子では紫外光照射によりぬれが増大し, 可視光照射または熱異性化によりぬれが元の値に回復した. この可逆的なぬれ変化は, アゾ色素がトランス体からシス体へ異性化することにより大きな双極子モーメントの変化が生じるためと考えられる. またPAAnと2-ヒドロキシエチルメタクリラートとの共重合体では, 光照射に伴うぬれの変化域が組成により異なることがわかった. スピロピラン系高分子でも光照射に伴いぬれが可逆的に変化した. この可逆的なぬれ変化はスピロピランの光イオン開裂に起因するものと考えられる.
Lagrangians of the SA multiconfigurational self-consistent field(SA-MCSCF) and multistate extended second-order quasidegenerate perturbation theory (MS-XMCQDPT2) coupled with reference interaction site model field constraint spatial electron density (RISM-SCF-cSED) are defined. In addition, variational equations were derived to calculate excitation energies target molecules dissolved in various solvents. The was applied a phenol molecule solutions gradients Hessian matrices calculated...
Abstract The hydrophobic interaction of amphiphilic copolymers, which contain 2‐hydroxyethyl methacrylate(HEMA) and 1vinyl‐2‐pyrrolidone (VPy), with Methyl Orange (MO) was compared that HEMA‐acrylamide (AAm) copolymers to deduce the correlation between their complexation ability in a photochromic azo dye photoviscosity effect aqueous copolymer/dye complex solution. On basis dialysis data fluorometric analysis it appeared dependence on HEMA content due polymer dye. For comparable AAm bound...
Solvatochromic shifts of the activation free energies are important aspects to consider for reaction control. To predict energies, stationary points in a solution must be accurately determined along pathway. In this study, second-order Møller–Plesset perturbation (MP2) theory combined with reference interaction site model was applied using our fitting approach, and MP2 analytical energy gradient determined. The coupled-cluster thermal correction were calculated optimized geometry solvent...
Abstract Water‐soluble polymeric azodyes containing an azobenzene moiety in their side chain, p ‐phenylazoacrylanilide (PAAn)–acrylamide (AAm) copolymers, were synthesized and the adsorption‐desorption behavior of sodium dodecyl sulfate (SDS) onto these copolymers water was investigated by means conductivity measurements, with attention to hydrophobicity copolymer. The PAAn‐AAm copolymer/SDS complex aqueous solution decreased increasing PAAn composition This result indicates that SDS...
Abstract To regulate the pH value of an aqueous solution containing polyelectrolyte by photoirradiation, azoaromatic poly(carboxylic acid), acrylic acid(AA)‐ p ‐phenylazoacrylanilide (PAAn) copolymer was synthesized and photoresponse polymer investigated. AA‐PAAn copolymer, which takes a compact form in ordinary state owing to presence side chains, is transformed into extended when moieties are isomerized photoirradiation. Thus, can be reversible regulated irradiation interruption light...
フォトメカニカル効果におよぼす疎水性相互作用の寄与を明らかにする目的で,2-Uドロキシエチル=メタクリラート(HEMA)-N-ビニルピPtリドン(VPy)共重合体とアニオン性アゾ系色素からなる水溶液の粘度挙動より,光照射前後の分子形態変化と疎水性相互作用との相関について検討した。HEMA-VPy共重合体水溶液に色素を添加すると高分子電解質と類似の粘度挙動を示す複合体が形成され,色素の負電荷により共重合体の分子鎖は広がった形態となることがわかった。この分子鎖の広がりは共重合体の疎水性が大きいほどいちじるしく,複合体形成に疎水性相互作用が重要な役割を果たしていると考えられる。さらに複合体水溶液に光照射と光遮断を交互に行なうと,色素の光異性化と熱異性化に対応して複合体の分子形態が可逆的に変化することがわかった。またこのような光化学的形態変化は,共重合体の疎水性の増大とともに大きくなることが認められた。すなわち色素の光反応にともなう可逆的分子形態変化は,分子内の疎水性相互作用でコンパクトな形態を取りやすい共重合体ほど大きくなる。このことは水中で大きなフォトメカニカル効果を取り出すためには...
The characteristics of poly(methyl methacrylate) (PMMA) etching self-assembled poly(styrene-<i>block</i>-methyl (PS-<i>b</i>-PMMA) thin film for forming a polystyrene (PS) mask were investigated. In this investigation, first, the selectivity PMMA to PS under argon- and oxygen-plasma processes was evaluated. Higher obtained in case argon plasma (3.9) compared that oxygen (1.7). Second, investigate process detail, time dependence depth It found rate decreases by more than half after around 15...
We formulate frequency fluctuations of intramolecular vibrations a solute by exploring the fluctuation electrostatic potential solvents. present numerical methodology for estimating fluctuations; is based on reference interaction site model self-consistent field with constrained spatial electron density distribution, theoretical solvation fields classical statistic mechanics. By applying theory to C--N stretching several nitrile compounds, our estimated scale and bandwidth shift changing...
高分子カルボン酸とアゾ色素からなるコンプレックス溶液の光による可逆的なpH変化と高分子の化学構造との関係を検討する目的で, 高分子カルボン酸としてアクリル酸 (AA) -アクリルアニリド (AAn), メタクリル酸 (MA) -メタクリルアニリド (MAn) あるいはMA-メタクリルアミド (MAm) 共重合体を合成した. MA共重合体水溶液にアニオン性のアゾ色素を添加すると低中和度領域でコンプレックスが形成され, 結合した色素の負電荷により系のpHが上昇した. AA-AAn共重合体系の場合には, 色素の添加により逆にpHが低下し, 中性塩を添加したときと同様の静電しゃへい (遮蔽) 効果を示した. MA共重合体からなるコンプレックス水溶液に光照射と光しゃ (遮) 断を交互に行うと, 色素の光異性化と熱異性化に対応して系のpHが可逆的に変化することがわかった. また, このような光pH変化の領域が, 共重合体の組成あるいはコモノマーの種類を変えることで規制できると結論した.
Photoresponsive polymeric adsorbents were prepared by coating of insoluble support with azo dyes. Adsorption behaviors amphipathic proteins to the adsorbent studied. The adsorption behavior suggests that hydrophobicity these protein surface is different from each other.
The authors determine the spin-orbit-splitting energies in electronic ground states of Ar${}^{+}$, Kr${}^{+}$, and Kr${}^{2+}$ from temporal evolution wave packets generated by strong-field ionization neutral atoms singly charged ion, respectively. results are agreement with earlier measurements significantly improved precision.