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- 주제어 : Magnetic mesoporous carbon (검색결과 6 건)
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자성에 의해 분리 가능한 메조포러스 카본의 소프트 주형 합성
박성수 ( Sung Soo Park ),하창식 ( Chang-sik Ha ) 한국접착및계면학회 2017 접착 및 계면 Vol.18 No.2
본 연구에서는 잘 배열된 나노세공 구조와 자성체 나노입자를 포함하는 메조포러스 카본(Carbonized Ni-FDU-15)을 합성하였다. Carbonized Ni-FDU-15는 구조형성 주형으로 트리블럭 공중합체(F127)를 이용하고, 카본 세공벽 형성 물질로 resol 전구체를 사용하며 질산 니켈(nickel(II) nitrate)을 금속이온 원으로 사용하여 증발유도 자기조립(Evaporation-Induced Self-Assembly, EISA)과 직접 탄화과정을 거쳐서 합성되었다. 메조포러스 카본은 잘 배열된 이차원적 육방체 구조(2D-hexagonal structure)를 가진다. 한편, 세공벽 내 자성체 나노입자는 니켈(Ni) 금속과 니켈 산화물(NiO)이 생성되었다. 나노입자의 크기는 약 37nm이었다. 그리고 Carbonized Ni-FDU-15의 표면적, 세공크기, 세공부피는 각각 558 m<sup>2</sup>g<sup>-1</sup>, 22.5 A 그리고 0.5 cm<sup>3</sup>g<sup>-1</sup>이었다. Carbonized Ni-FDU-15는 외부에서 자력을 가하였을 때 자력이 가해지는 방향으로 이동함을 확인하였다. 이러한 자성체 담지 메조포러스 카본 물질은 흡착/분리, 자기 저장 매체, 자성 유체(ferrofluid), 자기 공명 영상(MRI) 및 약물 타겟팅 등의 광범위한 응용 분야에 높은 응용성을 가질 것으로 기대된다. In this study, we synthesized mesoporous carbon (Carbonized Ni-FDU-15) containing nanoporous structures and magnetic nanoparticles. Carbonized Ni-FDU-15 was synthesized via evaporation-induced self-assembly (EISA) and direct carbonization by using a triblock copolymer (F127) as a structure-directing agent, a resol precursor as a carbon-pore wall forming material, and nickel (II) nitrate as a metal ion source. The mesoporous carbon has a well-ordered two-dimensional hexagonal structure. Meanwhile, nickel (Ni) metal and nickel oxide (NiO) were produced in the magnetic nanoparticles in the pore wall. The size of the nanoparticles was about 37 nm. The surface area, pore size and pore volume of Carbonized Ni-FDU-15 were 558 m<sup>2</sup>g<sup>-1</sup>, 22.5 A and 0.5 cm<sup>3</sup>g<sup>-1</sup>, respectively. Carbonized Ni-FDU-15 was found to move in the direction of magnetic force when magnetic force was externally applied. The magnetic nanoparticle-bearing mesoporous carbons are expected to have high applicability in a wide variety of applications such as adsorption/separation, magnetic storage media, ferrofluid, magnetic resonance imaging (MRI) and drug targeting, etc.
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Kim, Moon Il,Ye, Youngjin,Won, Byoung Yeon,Shin, Sujeong,Lee, Jinwoo,Park, Hyun Gyu WILEY‐VCH Verlag 2011 Advanced Functional Materials Vol.21 No.15
<P><B>Abstract</B></P><P>A conductive multi‐catalyst system consisting of Fe<SUB>3</SUB>O<SUB>4</SUB> magnetic nanoparticles (MNPs) and oxidative enzymes co‐entrapped in the pores of mesoporous carbon is developed as an efficient and robust electrochemical biosensing platform. The construction of the nanocomposite begins with the incorporation of MNPs by impregnating Fe(NO<SUB>3</SUB>)<SUB>3</SUB> on a wall of mesoporous carbon followed by heat treatment under an Ar/H<SUB>2</SUB> atmosphere, which results in the formation of magnetic mesoporous carbon (MMC). Glucose oxidase (GOx) is subsequently immobilized in the remaining pore spaces of the MMC by using glutaraldehyde crosslinking to prevent enzyme leaching from the matrix. H<SUB>2</SUB>O<SUB>2</SUB> generated by the catalytic action of GOx in proportion to the amount of target glucose is subsequently reduced into H<SUB>2</SUB>O by the peroxidase mimetic activity of MNPs generating cathodic current, which can be detected through the conductive carbon matrix. To develop a robust and easy‐to‐use electrocatalytic biosensing platform, a carbon paste electrode is prepared by mechanically mixing the nanocomposite or MMCs and mineral oil. Using this strategy, H<SUB>2</SUB>O<SUB>2</SUB> and several phenolic compounds are amperometrically determined employing MMCs as peroxidase mimetics, and target glucose was successfully detected over a wide range of 0.5 × 10<SUP>−3</SUP> to 10 × 10<SUP>−3</SUP> <SMALL>M</SMALL>, which covers the actual range of glucose concentration in human blood, with excellent storage stability of over two months at room temperature. Sensitivities of the biosensor (19 to 36 nA m<SMALL>M</SMALL><SUP>−1</SUP>) are about 7–14 times higher than that of the biosensor using immobilized GOx in mesoporous carbon without MNPs under optimized condition. The biosensor is of considerable interest because of its potential for expansion to any oxidases, which will be beneficial for use in practical applications by replacing unstable organic peroxidase with immobilized MNPs in a conductive carbon matrix.</P>
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Wenlu Guo,Xiangguo Meng,Yan Liu,Liang Ni,Zhaoyong Hu,Rui Chen,Minjia Meng,Yun Wang,Juan Han,Min Luo 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The new 8-hydroxyquinoline (8-HQ) modified magnetic mesoporous carbon (8-HQ-Ni-CMK-3) wasprepared and applied for adsorption of multivariate metal ions from aqueous solution. The preparedadsorbent was characterized by Fourier transform infrared, X-ray diffraction, scanning electronmicroscopy, transmission electron microscope, nitrogen adsorption-desorption isotherm, elementalanalysis, and vibrating sample magnetometer. The static adsorption behaviors toward multivariatemetal ions on graphite, the modified graphite by 8-HQ, magnetic mesoporous carbon, and 8-HQ-Ni-CMK-3 were compared, which showed that 8-HQ-Ni-CMK-3 had excellent adsorption capacity. Theremoval of multivariate metal ions using 8-HQ-Ni-CMK-3 by fixed-bed column was further investigated.
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Inorganic Nanobiomaterial Drug Carriers for Medicine
라젠드라 쿠마르 씽,김해원 한국조직공학과 재생의학회 2013 조직공학과 재생의학 Vol.10 No.6
Inorganic nanomedicine refers to the use of inorganic or hybrid nanomaterials and nanosized objects to achieve innovative medical breakthroughs for drug and gene discovery and delivery, discovery of biomarkers, and molecular diagnostics. It is widely believed that nanomaterials will be increasingly used in biomedical applications. However, before these novel materials can be safely applied in a clinical setting, their biocompatibility, biodistribu-tion and biodegradation needs to be carefully assessed. There are a number of different classes of nanoparticles that hold promise for biomedical purposes. Here, we will focus on some of the most commonly studied nanomaterials:Ca-P ceramics, mesoporous silica particles, magnetic nanoparticles, and carbon nanotubes. In this review, we dis-cuss the mechanism of cellular uptake of inorganic nanoparticles and the biodistribution depending on the physico-chemical properties of the particles and in particular on their surface characteristics. Limitations and toxicity issues associated with inorganic nanoparticles in living organisms are also discussed.
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