http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jang, Hyowon,Lee, Chang Yeol,Lee, Seoyoung,Park, Ki Soo,Park, Hyun Gyu The Royal Society of Chemistry 2019 Nanoscale Vol.11 No.8
<P>A new isothermal nucleic acid amplification method termed FERA (Flap endonuclease-initiated Enzymatic Repairing Amplification) is developed for the ultrasensitive detection of target nucleic acids. In the FERA method, flap endonuclease (FEN) catalyzes the hydrolytic cleavage at the junction of single- and double-stranded DNAs which is formed only in the presence of target nucleic acids, and releases short oligonucleotides to promote the cyclic enzymatic repairing amplification (ERA) combined with FEN-based amplification. As a result, a large amount of single- and double-stranded DNAs are generated under the isothermal conditions, leading to the high fluorescence intensity from the SYBR I green dye. Relying on the powerful amplification method, we successfully determined the target nucleic acids with a limit of detection as low as 15.16 aM, which corresponds to approximately 180 molecules in 20 μL reaction volume, and verified the practical applicability by detecting long target nucleic acids derived from <I>Chlamydia trachomatis</I>.</P>
Investigation on Ferroelectric Memory with Complementary Organic-Inorganic Hybrid Insulator
Hyowon Jang(장효원),Yongju Lee(이용주),Swarup Biswas(비스와스 스와럽),Hyeok Kim(김혁) 대한전자공학회 2024 대한전자공학회 학술대회 Vol.2024 No.6
Flexible memory technologies that work in a variety of environments are now necessary due to the increased interest in flexible semiconductors and flexible displays. This is especially true considering the development of the Internet of Things (IoT) and Artificial Intelligence (AI), which has increased the importance of the memory semiconductor industry. This research is an experiment using P(VDF-TrFE), an organic ferroelectric, and SiO₂, an inorganic insulator1), as a bi-layer. When using a bi-layer, SiO₂ 5 nm and P(VDF-TrFE) 600 nm showed the largest memory window value. Also, gate current value was very low at 10<SUP>-8</SUP> A.
Stereoselective Synthesis of 7-<i>epi</i>-Incarvilline
Seo, Hyowon,Yun, Hwayoung,Lee, Sujin,Jang, Jaebong,Han, Young Taek,Kim, Dae-Duk,Lee, Jeeyeon,Suh, Young-Ger American Chemical Society 2013 Organic letters Vol.15 No.3
<P>The enantioselective synthesis of 7-<I>epi</I>-incarvilline for formal syntheses of (−)-incarvilline, (+)-incarvine C, and (−)-incarvillateine is described. The key features of our synthesis involve (1) stereoselective construction of the optically active bicyclic lactone utilizing Pd(0)-catalyzed allylic alkylation, (2) efficient transformation of the bridged bicyclic lactone to the key bicyclic lactam skeleton, and (3) stereoselective elaborations of two stereocenters via a substrate-controlled catalytic hydrogenation and a 1,4-addition.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/orlef7/2013/orlef7.2013.15.issue-3/ol303395f/production/images/medium/ol-2012-03395f_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ol303395f'>ACS Electronic Supporting Info</A></P>
Hyejin Jang,Dongjae Kim,Hyowon Tak,남재욱,김태일 한국물리학회 2016 Current Applied Physics Vol.16 No.1
Mechanically ultra-robust, transparent and flexible electrodes assembled from silver nanowires (Ag NWs) are presented. Highly aligned NWs embedded in ultrathin (100 nm thick) adhesive are demonstrated for ultra-mechanical stability, negligible hysteresis against harsh bending on 0.15 mm radius of curvature. Instead of random arrangement, we utilize a grid array structure of NWs fabricated from multiple transfer printing. The grid structure allows to have low areal fraction, which leads to high transmittance, yet low sheet resistance, i.e. improved opto-electrical performance comparing with the random arrangement. In addition, a simplified lithography method of NW array is demonstrated. We strongly believe that such flexible and transparent electrodes can be used in many applications including optoelectronic devices and flexible/wearable electronics.
Ahmad, Raheel,Jang, Hyowon,Batule, Bhagwan S.,Park, Hyun Gyu American Chemical Society 2017 ANALYTICAL CHEMISTRY - Vol.89 No.17
<P>We have devised a barcode DNA-mediated signal amplifying strategy for ultrasensitive biomolecular detection by utilizing matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). As a model target, thrombin was first captured by specific aptamer15 functionalized on magnetic beads (MBs-apt15) and sandwiched through the simultaneous interaction with gold nanoparticles modified with another specific aptamer29 and barcode DNA molecules (apt29-AuNPs-bcDNAs). The sandwiched complex was collected by convenient magnetic separation and then treated with potassium cyanide (KCN) to dissolve the gold nanoparticles (AuNPs) and consequently release the barcode DNA molecules (bcDNAs), which were then again magnetically separated and analyzed by using MALDI-TOF MS. Under optimized conditions, this strategy revealed an excellent sensitivity with a limit of detection of 0.89 aM in a wide linear detection range from 0 aM to 0.1 nM and exhibited an acceptable recovery for thrombin detection in complex biological matrices. This signal amplifying strategy based on MALDI-TOF MS could greatly enable the ultrasensitive detection of various low abundant biomolecules.</P>