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Huang, Xinhua,Varyambath, Anuraj,Kim, Mi Ri,Kim, Mi-Ra,Kim, Il American Scientific Publishers 2017 Journal of Nanoscience and Nanotechnology Vol.17 No.10
<P>Herein, we report a facile technique for preparing a multicomponent electrocatalyst that has demonstrated promising activity in the electrooxidation of alcohol. The synthesis protocol involved the preparation of hyperbranched polynaphthalene (HPN) solid microspheres that were mixed with PdCl2, and subsequently reduced to Pd (0) using an aqueous NaBH4 solution. Finally, the HPN microsphere-supported palladium nanoparticles (Pd/HPNC) were obtained after undergoing thermal treatment. The unique porous construction of the microspheres resulted in higher surface area and lower resistance. The evaluation of the Pd/HPNC electrocatalyst showed improved performance, with a high degree of reaction efficiency.</P>
Huang, Xinhua,Jeong, Young-Il,Moon, Byeong Kyu,Zhang, Lidong,Kang, Dae Hwan,Kim, Il American Chemical Society 2013 Langmuir Vol.29 No.10
<P>Tetraarylmethane compounds consisting of two pyrogallol and two aniline units, namely, Ar<SUB>2</SUB>CAr′<SUB>2</SUB> {Ar = 3,4,5-C<SUB>6</SUB>H<SUB>2</SUB>(OH)<SUB>3</SUB> and Ar′ = 3,5-R<SUB>2</SUB>-4-C<SUB>6</SUB>H<SUB>2</SUB>NH<SUB>2</SUB> [R = Me (<B>1</B>), <I>i</I>Pr (<B>2</B>)]} exhibit excellent self-assembly behavior. Compound <B>1</B> yields size-tunable hollow nanospheres (HNSs) with a narrow size distribution, and <B>2</B> yields various morphologies ranging from microtubules to microrods <I>via</I> self-assembly induced by hydrogen bonding and π–π stacking interactions. On the basis of the experimental results, a plausible mechanism for morphology tunability was proposed. As a means of utilizing the self-assembled HNSs for targeting controlled drug delivery, folic acid (FA) and rhodamine 6G (Rh6G) were grafted onto compound <B>1</B> to yield the FA–Rh6G–<B>1</B> complex. The HNSs fabricated with FA–Rh6G–<B>1</B> showed low cytotoxicity against human embryonic kidney 293T cells and CT26 colon carcinoma cells and good doxorubicin (DOX) loading capacity (9.6 wt %). The FA receptor-mediated endocytosis of FA–Rh6G–<B>1</B> HNSs examined by using a confocal laser scanning microscope and a flow cytometer revealed that the uptake of FA–Rh6G–<B>1</B> HNSs into CT26 cells was induced by FA receptor-mediated endocytosis. <I>In vitro</I> drug delivery tests showed that the DOX molecules were released from the resulting HNSs in a sustainable and pH-dependent manner, demonstrating a potential application for HNSs in targeted drug delivery for cancer therapy.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2013/langd5.2013.29.issue-10/la305069e/production/images/medium/la-2012-05069e_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/la305069e'>ACS Electronic Supporting Info</A></P>
Huang, Xinhua,Kim, Seok,Heo, Min Seon,Kim, Ji Eun,Suh, Hongsuk,Kim, Il American Chemical Society 2013 Langmuir Vol.29 No.39
<P>An easy template-free approach to the fabrication of pure carbon microspheres has been achieved via direct pyrolysis of as-prepared polyaromatic hydrocarbons including polynaphthalene and polypyrene. The polyaromatics were synthesized from aromatic hydrocarbons (AHCs) using anhydrous zinc chloride as the Friedel–Crafts catalyst and chloromethyl methyl ether as a cross-linker. The experimental results show that the methylene bridges between phenyl rings generate a hierarchical porous polyaromatic precursor to form three-dimensionally (3D) interconnected micro-, meso-, and macroporous networks during carbonization. These hierarchical porous carbon aggregates of spherical carbon spheres exhibit faster ion transport/diffusion behavior and increased surface area usage in electric double-layer capacitors. Furthermore, micropores are present in the 3D interconnected network inside the cross-linked AHC-based carbon microspheres, thus imparting an exceptionally large, electrochemically accessible surface area for charge accumulation.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2013/langd5.2013.29.issue-39/la4026969/production/images/medium/la-2013-026969_0012.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/la4026969'>ACS Electronic Supporting Info</A></P>
Shuai Huang,Xiumin Xie,Qiang Xu,Xinhua Zhao,Guangwei Deng,Qiang Zhou,You Wang,Hai-Zhi Song 한국광학회 2020 Current Optics and Photonics Vol.4 No.6
A practical single photon source for fiber-based quantum information processing is still lacking. As a possible 1.55-µm quantum-dot single photon source, an InGaAsP/InP-air-aperture micropillar cavity is investigated in terms of fabrication tolerance. By properly modeling the processing uncertainty in layer thickness, layer diameter, surface roughness and the cavity shape distortion, the fabrication imperfection effects on the cavity quality are simulated using a finite-difference time-domain method. It turns out that, the cavity quality is not significantly changing with the processing precision, indicating the robustness against the imperfection of the fabrication processing. Under thickness error of ±2 nm, diameter uncertainty of ±2%, surface roughness of ±2.5 nm, and sidewall inclination of 0.5°, which are all readily available in current material and device fabrication techniques, the cavity quality remains good enough to form highly efficient and coherent 1.55-µm single photon sources. It is thus implied that a quantum dot contained InGaAsP/InP-air-aperture micropillar cavity is prospectively a practical candidate for single photon sources applied in a fiber-based quantum information network.
Shoucheng Huang,Xinhua Guo,Rongkun Wang,Yunhui Mei 전력전자학회 2021 JOURNAL OF POWER ELECTRONICS Vol.21 No.12
In a four-switch three-phase inverter-powered permanent magnet synchronous motor system, the capacitor voltage fluctuates due to the unequal capacitance and the charging and discharging of the bus capacitor. As such, the accuracy of motor vector control becomes significantly affected and even causes the shutdown of the motor drive system. Therefore, this study proposed a space vector PWM (SVPWM) algorithm that considers capacitor voltage imbalance. In the case of voltage basic vector offset, this algorithm first constructs a new orthogonal voltage basic vector and takes the offset modulation range as the constraint condition to synthesize a new target voltage vector. Compared with the traditional SVPWM algorithm, the proposed SVPWM algorithm controls the capacitor voltage fluctuation range in a reasonable range, simplifies the calculation, improves the three-phase stator current asymmetry, and reduces the current harmonic content. Simulation and experimental results demonstrate the effectiveness and feasibility of the proposed SVPWM algorithm.
Ni, Dongjiao,Huang, Xiang,Wang, Zhibo,Deng, Lin,Zeng, Li,Zhang, Yiwei,Lu, Dongdong,Zou, Xinhua Asian Australasian Association of Animal Productio 2020 Animal Bioscience Vol.33 No.3
Objective: The Yip1 domain family (YIPF) proteins were proposed to function in endoplasmic reticulum (ER) to Golgi transport and maintenance of the morphology of the Golgi, which were homologues of yeast Yip1p and Yif1p. YIPF3, the member 3 of YIPF family was a homolog of Yif1p. The aim of present study was to investigate the expression and regulation mechanism of porcine YIPF3. Methods: Quantitative realtime polymerase chain reaction (qPCR) was used to analyze porcine YIPF3 mRNA expression pattern in different tissues and pig kidney epithelial (PK15) cells stimulated by polyinosine-polycytidylic acid (poly [I:C]). Site-directed mutations combined with dual luciferase reporter assays and electrophoretic mobility shift assay (EMSA) were employed to reveal transcription regulation mechanism of porcine YIPF3. Results: Results showed that the mRNA of porcine YIPF3 (pYIPF3) was widely expressed with the highest levels in lymph and lung followed by spleen and liver, while weak in heart and skeletal muscle. Subcellular localization results indicated that it expressed in Golgi apparatus and plasma membranes. Upon stimulation with poly (I:C), the level of this gene was dramatically up-regulated in a time- and concentration-dependent manner. pYIPF3 core promoter region harbored three cis-acting elements which were bound by ETS proto-oncogene 2 (ETS2), zinc finger and BTB domain containing 4 (ZBTB4), and zinc finger and BTB domain containing 14 (ZBTB14), respectively. In which, ETS2 and ZBTB4 both promoted pYIPF3 transcription activity while ZBTB14 inhibited it, and these three transcription factors all played important regulation roles in tumorigenesis and apoptosis. Conclusion: The pYIPF3 mRNA expression was regulated by ETS2, ZBTB4, and ZBTB14, and its higher expression in immune organs might contribute to enhancing ER to Golgi transport of proteins, thus adapting to the immune response.
Il Kim,Xinhua Huang,Miri Kim,Hongsuk Suh 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.7
We developed 3-D network carbon materials by directly pyrolyzing as-prepared polynaphthalene (PNT). The PNT-based materials were synthesized from chloromethylated naphthalene and were self-polymerized using anhydrous aluminum chloride as the Friedel-Crafts catalyst and chloromethyl methyl ether as a crosslinker. The micro-, meso-, and macroporous 3-D carbon materials showed large specific surface areas, large electrolyte-electrode interface areas, and continuous electron transport paths. MnO2/carbon composites were then synthesized by chemically depositing MnO2 onto the carbon substrate surfaces through a self-limiting redox reaction between KMnO4 solution and carbon substrates, producing high-performance pseudo-capacitor electrodes. The unique electrode architecture demonstrated high capacitance up to 286.8 F g−1, and good cycling stability up to 1000 cycles without losing its capacitance. The electrode shows potential applications for the development of high-performance supercapacitors for a variety of power-demanding devices.