Cho, Jung Min Ko, Young Jin Lee, Hak Joo Choi, Heon-­Jin Baik, Young Joon PARK, JONG KEUK Kwak, Joon Young Kim, Jae wook Park, Jong kil Jeong, Yeon Joo Kim, In ho LEE, KYEONG SEOK Lee, Wook­Seong 2024-01-12T03:32:37Z 2024-01-12T03:32:37Z 2022-03-07 2022-02 1613-6810 https://pubs.kist.re.kr/handle/201004/76800 The diamond-graphite hybrid thin film with low-dimensional nanostructure (e.g., nitrogen-included ultrananocrystalline diamond (N-UNCD) or the alike), has been employed in many impactful breakthrough applications. However, the detailed picture behind the bottom-up evolution of such intriguing carbon nanostructure is far from clarified yet. Here, the authors clarify it, through the concerted efforts of microscopic, physical, and electrochemical analyses for a series of samples synthesized by hot-filament chemical vapor deposition using methane-hydrogen precursor gas, based on the hydrogen-dependent surface reconstruction of nanodiamond and on the substrate-temperature-dependent variation of the growth species (atomic hydrogen and methyl radical) concentration near substrate. The clarified picture provides insights for a drastic enhancement in the electrochemical activities of the hybrid thin film, concerning the detection of important biomolecule, that is, ascorbic acid, uric acid, and dopamine: their limits of detections are 490, 35, and 25 nm, respectively, which are among the best of the all-carbon thin film electrodes in the literature. This work also enables a simple and effective way of strongly enhancing AA detection. English Wiley - V C H Verlag GmbbH & Co. Bottom-Up Evolution of Diamond-Graphite Hybrid Two-Dimensional Nanostructure: Underlying Picture and Electrochemical Activity Article 10.1002/smll.202105087 1 Small, v.18, no.8 Small 18 8 N scie scopus 000729090800001 2-s2.0-85120890718 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article ASCORBIC-ACID SELECTIVE DETECTION HIGH-PERFORMANCE URIC-ACID C-H DOPAMINE GRAPHENE GROWTH FILM DIFFERENTIATION all-carbon electrochemical electrodes dehydrogenation-induced surface reconstruction diamond？graphite hybrid thin films, nanodiamonds simultaneous electrochemical detection two-dimensional carbon nanostructure evolution mechanism