안성필 교수님 연구실에서 3월 20일(금)에 Specail Lecture를 진행합니다. 

관심 있는 분의 많은 참석 바랍니다.

  ○ 일시 : 2026년 3월 20일(금) 14 : 30~ 16 :00 

  ○ 장소 : 제2종합연구동 83188 (김영진 첨단강의실)

■ Lecture 1  

  ○ 제목 : Green Transformation Studies at Hokkaido University

  ○ 연사 : Hiroki Habazaki, Hokkaido University

   ○ 초록

Achieving carbon neutrality has become an urgent global challenge, highlighting the growing need for Green Transformation (GX) that fundamentally reshapes energy systems, industries, and societal structures. Hokkaido University (HU) has long been committed to addressing global environmental challenges through interdisciplinary research and education. Recently, HU established GX Innovation Center (HU-GXC), which integrates knowledge from science, engineering, agriculture, and environmental sciences to develop practical solutions for decarbonization, renewable energy utilization, and sustainable resource management. HU-GXC also serves as a collaborative platform connecting academia, industry, government, and local communities. In this talk, the activities of HU-GXC will be introduced, together with the author’s research on anodizing processes and their applications to energy and environmental challenges.

■ Lecture2  

  ○ 제목 : Advances in Aluminum Anodizing Using Alkaline Borate Electrolytes

  ○ 연사 : Mana Iwai, Hokkaido University

   ○ 초록

Our research group has demonstrated that alkaline borate electrolytes enable unprecedented anodizing regimes and nanostructured alumina architectures. In sodium tetraborate electrolytes, anodizing reveals a new self-ordering regime with a proportionality constant of k = 3.0 nm V⁻¹, exceeding the conventional acidic regime (k = 2.5 nm V⁻¹) ^[1]. This process produces highly regular hexagonal pore arrays accompanied by characteristic feather-like nanospikes on the pore walls and enables stable, burning-free oxide growth even on complex three-dimensional substrates.

In contrast, anodizing in sodium metaborate solutions allows the formation of entirely different nanostructures. These include ultra-high-porosity “loofah-like” films with a porosity of up to 0.93 fabricated at extremely low voltages (0.1 V), as well as ultra-flat barrier layers with a minimum roughness of 0.4 nm formed at high voltages ^[2].

A critical advantage of these alkaline processes is the formation of high-purity, anion-free alumina. Owing to this high purity and a larger anodizing ratio, the resulting films exhibit chemical stability approximately twice that of conventional anodic films produced in acidic electrolytes, in both acidic and alkaline corrosive environments ^[3]. Finally, applying this technology to practical aluminum alloys such as A5052 enables advanced surface functionalization that suppresses the Leidenfrost effect at high temperatures (473 K), significantly improving cooling efficiency for industrial thermal management ^[4].

In summary, alkaline anodizing provides promising opportunities for applications such as next-generation thermal management, high-surface-area nanotemplates, and improved corrosion-resistant coatings.