Wakayama University · Faculty of Systems Engineering · 教授

Research keywordsAnalytical Chemistry・Chemical Sensors・レアメタル回収・分析化学・化学センサー

This is a public-data preview. Personalized fit, contact angles, and saved workflows require sign-in.

• Synthesis of nanoporous silica nanoparticles encapsulating porphyrin derivatives by non-surface-protected hot water etching for their fluorescent sensing of metal ions in water2025 · Yoshio Nakahara, Ami Kawashima, Natsuki Terashima, Mitsuru Watanabe, Toshiyuki Tamai, Setsuko Yajima
• 多波長励起光を備えた光熱変換顕微鏡による水中でのチオリンゴ酸修飾銀ナノ粒子の凝集挙動の定量評価2025 · 中原佳夫, 宮崎 淳, 廣野碧唯, 家永隆史, 矢嶋摂子
• Properties of surface layers of polyethylene naphthalate substrates modified by ultraviolet light irradiation for their electroless deposition2024 · The properties of thin surface layers of polymer substrates should be investigated and controlled for their application in electroless deposition. In this paper, polyethylene naphthalate (PEN) and polyethylene terephthalate (PET) substrates were modified by plasma treatment, ultraviolet (UV)/ozone treatment, or UV (254 nm) irradiation. The chemical and physical properties of the modified layer were studied by measuring contact angle and zeta potential, field-emission scanning electron microscope (FE-SEM) imaging, and infrared spectroscopy. The condition of the surface modification affected oxygenation of the polymer chains. The oxygenation formed hydrophilic surface functional groups and relatively polar low-molecular-weight fragments resulting from the scission of the polymer chains. The surface functional groups and the fragments governed the properties of the modified layer. Adhesive metal films were electrolessly deposited on the thinner modified layer having the hydrophilic functional groups. In contrast, the thicker modified layer containing the fragments decreased the adhesion of the metal films. For example, UV/ozone treatment of the PEN substrate formed the thicker modified layer, on which no adhesive metal films were deposited. These findings illustrate that optimizing the condition of the surface modification thoroughly is feasible to form the modified layer having the chemical and physical properties appropriate for depositing adhesive metal films.
• Quantitative Discrimination of Silver and Gold Nanoparticles Immobilized in Transparent Plastic Film by Photothermal Microscopy with Multiwavelength Excitation2023 · Yoshio Nakahara, Jun Miyazaki, Aoi Hirono, Takashi Ienaga, Setsuko Yajima

• 排ガス浄化触媒からの回収を目指したパラジウム選択性吸着剤の開発2011
• リン脂質部位化学結合型生体適合性イオンセンサーの開発2010
• 液晶化合物を材料とする医療分析のためのイオンセンサーの開発2005
• 生体適合性ニュートラルキャリア型イオンセンサーに関する研究

• Official profile
• ORCID