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NTIS 바로가기세라미스트 = Ceramist, v.20 no.3, 2017년, pp.26 - 37
권우혁 (인천대학교 신소재공학과) , 김현구 (인천대학교 신소재공학과) , 이한보람 (인천대학교 신소재공학과)
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핵심어 | 질문 | 논문에서 추출한 답변 |
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미세공정의 중요 공정에는 어떠한 것들이 있는가? | 미세공정은 크게 보면 일반적으로 증착(deposition), 포토리소그래피(photo-lithography), 식각(etching)의 세개의 중요 공정으로 이루어져 있다. 이 중 증착 공정은 물리적 기상 증착법(physical vapor deposition; PVD) 이나 화학적 기상 증착법(chemical vapor deposition; CVD)을 주로 사용한다. | |
2차원 물질의 특징은 무엇인가? | 그래핀(graphene)의 발견으로부터 시작된 2차원 물질 군으로의 분류는 현재 그것의 전기적 특성에 따라 전도체, 반도체, 부도체로 나누고 있다.1-3) 그 명칭에서 알 수 있는 것처럼 2차원 물질은 높이 방향은 제한되고, 평면 방향으로만 넓게 펼쳐져 있는 2차원의 모양을 하고 있는 것을 특징으로 한다. 높이 방향으로 제한된 두께는 수원자 층 두께를 가지며, 이러한 형태와 구조 때문에 다양한 물리적, 화학적 특성을 보인다. | |
2차원 물질의 층이 쉽게 분리되는 이유는? | 2차원 물질 뿐만 아니라 층상 구조 소재(layered materials) 등 다양한 명칭으로 불리우고 있다. 실제로 2차원 형태를 갖는 이유가 평면 방향으로는 강한 공유결합으로 이루어져 있는 반면, 층 간의 결합력은 반데르발스 힘(van der Waals force)로 상대적으로 약하기 때문에 2차원 층들이 쉽게 분리되기 때문이다.1-3) 널리 알려진 예로, 연필심에 사용되는 흑연은 대표적인 층상 구조로서 평면 방향으로는 탄소 원자들이 강한 공유결합으로 연결되어 있지만, 층 간의 약한 결합력 때문에 손쉽게 분리되어 부드럽게 글씨가 써지는 용도로 사용되고 있다 |
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