Home
학과소개
주임교수 인사말 학과소개 연혁 비전 및 진로 학과를 위한 기부 PCE 어울림 소식지 홍보자료 찾아오시는길
사람들
교수진 직원
연구
RESEARCH OUTCOME 연구분야 보유연구장비 연구소&연구센터 연구관련정보센터
학부/대학원
학부 대학원
  • 4단계 BK21 사업
    • 학생활동
    화공과 궁금하니? PCE졸업생 인터뷰 우리들의 활동 PCE 스튜디오 너화아
    알림마당
    공지사항 정기세미나 새소식 학사일정 취업정보
    자료실
    강의실이용안내 각종서식 갤러리
    닫기

    알림마당

    특별초청 세미나

    미래를 창조하는 포스텍 화학공학과

    Nanodiamonds that swim

    일자
    2017.07.05(수)
    시간
    17:00~
    연사
    김지태 교수
    장소
    환경공학동 208호
    소속
    Department of Mechanical Engineering, The University of Hong Kong
    Nanodiamonds with nitrogen vacancies have emerged as a next-generation stable and biocompatible fluorescence reporter. Recent research activity has demonstrated their exceptional sensitivity in detecting extremely small magnetic [1] and electric fields [2], or local temperature [3] changes inside a living cell. The magnetic field splits the excited state and makes the triplet-singlet electronic transition sensitive to the environment including (small) external magnetic fields. In this context, it is of interest to trap and manipulate nanodiamonds to control their position and orientation. This has so far only been possible using indirect methods. Here, we present a general scheme that can be used to obtain nanodiamonds that are both “active” in that they can self-propel and that allow their translation and rotation to be controlled without a direct contact [4]. The active ND swimmer developed here is composed of a ND crystal containing NV centers and a light-driven self-thermophoretic micromotor. We show the precise manipulation of its locomotion in fluids - from translational to rotational motion - by exploiting shape- dependent hydrodynamic interactions. To prove our concept, we will discuss the feasibility of addressing the nanodiamonds NV electron spin resonance for magnetometry.
     
    [1] Balasubramanian et al., Nature 455, 648 (2008)
    [2] Dolde et al., Nat. Phys. 7, 459 (2011)
    [3] Kucsko et al., Nature 500, 54 (2013)
    [4] Kim et al., Adv. Mater. (in press)