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- 저자 : Faustini, M (검색결과 5 건)
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Faustini, Marco,Kim, Jun,Jeong, Guan-Young,Kim, Jin Yeong,Moon, Hoi Ri,Ahn, Wha-Seung,Kim, Dong-Pyo American Chemical Society 2013 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.135 No.39
<P>Herein, we report a novel nanoliter droplet-based microfluidic strategy for continuous and ultrafast synthesis of metal–organic framework (MOF) crystals and MOF heterostructures. Representative MOF structures, such as HKUST-1, MOF-5, IRMOF-3, and UiO-66, were synthesized within a few minutes via solvothermal reactions with substantially faster kinetics in comparison to the conventional batch processes. The approach was successfully extended to the preparation of a demanding Ru<SUB>3</SUB>BTC<SUB>2</SUB> structure that requires high-pressure hydrothermal synthesis conditions. Finally, three different types of core–shell MOF composites, i.e., Co<SUB>3</SUB>BTC<SUB>2</SUB>@Ni<SUB>3</SUB>BTC<SUB>2</SUB>, MOF-5@diCH<SUB>3</SUB>-MOF-5, and Fe<SUB>3</SUB>O<SUB>4</SUB>@ZIF-8, were synthesized by exploiting a unique two-step integrated microfluidic synthesis scheme in a continuous-flow mode. The synthesized MOF crystals were characterized by X-ray diffraction, scanning electron microscopy, and BET surface area measurements. In comparison with bare MOF-5, MOF-5@diCH<SUB>3</SUB>-MOF-5 showed enhanced structural stability in the presence of moisture, and the catalytic performance of Fe<SUB>3</SUB>O<SUB>4</SUB>@ZIF-8 was examined using Knoevenagel condensation as a probe reaction. The microfluidic strategy allowed continuous fabrication of high-quality MOF crystals and composites exhibiting distinct morphological characteristics in a time-efficient manner and represents a viable alternative to the time-consuming and multistep MOF synthesis processes.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2013/jacsat.2013.135.issue-39/ja4039642/production/images/medium/ja-2013-039642_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja4039642'>ACS Electronic Supporting Info</A></P>
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Neu, V,Schulze, C,Faustini, M,Lee, J,Makarov, D,Suess, D,Kim, S-K,Grosso, D,Schultz, L,Albrecht, M IOP Pub 2013 Nanotechnology Vol.24 No.14
<P>Magnetization reversal processes in Co/Pt multilayers prepared on nanoperforated templates are probed by magnetization relaxation measurements. The signature of pinning controlled domain wall movement as expected for percolated media is identified. This contrasts with the nucleation-type reversal mechanism of a Co/Pt reference film prepared on a smooth substrate. A zero field energy barrier of 93<I>k</I><SUB>B</SUB><I>T</I> is determined by fluctuation field measurements and is elucidated by micromagnetic calculations using the nudged elastic band method. This value is sufficiently large to qualify the material as a promising percolated medium.</P>
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Ko, Dong-Hyeon,Ren, Wurong,Kim, Jin-Oh,Wang, Jun,Wang, Hao,Sharma, Siddharth,Faustini, Marco,Kim, Dong-Pyo American Chemical Society 2016 ACS NANO Vol.10 No.1
<P>Gas and liquid streams are invariably separated either by a solid wall or by a membrane for heat or mass transfer between the gas and liquid streams. Without the separating wall, the gas phase is present as bubbles in liquid or, in a microsystem, as gas plugs between slugs of liquid. Continuous and direct contact between the two moving streams of gas and liquid is quite an efficient way of achieving heat or mass transfer between the two phases. Here, we report a silicon nanowire built-in microsystem in which a liquid stream flows in contact with an underlying gas stream. The upper liquid stream does not penetrate into the lower gas stream due to the superamphiphobic nature of the silicon nanowires built into the bottom wall, thereby preserving the integrity of continuous gas and liquid streams, although they are flowing in contact. Due to the superamphiphobic nature of silicon nanowires, the microsystem provides the best possible interfacial mass transfer known to date between flowing gas and liquid phases, which can achieve excellent chemical performance in two-phase organic syntheses.</P>
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Sara Perteghella,Alessandro Gaviraghi,Silvia Cenadelli,Valeria Bornaghi,Andrea Galli,Barbara Crivelli,Barbara Vigani,Daniele Vigo,Theodora Chlapanidas,Massimo Faustini,Maria Luisa Torre 대한수의학회 2017 Journal of Veterinary Science Vol.18 No.1
The use of artificial insemination (AI) in buffalo (Bubalus bubalis) is limited by poor ovarian activity during the hot season, seasonal qualitative patterns in semen, low resistance of sperm cells in the female tract, difficulties in estrus detection, and variable estrus duration. Although AI procedures are commonly used in bovine, use of AI has been limited in buffalo. In the zootechnical field, different studies have been conducted to develop techniques for improvement of fertilizing ability of buffalo spermatozoa after AI. In this study, for the first time, the use of alginate encapsulation and cryopreservation of buffalo spermatozoa is described, and the same procedure was performed with Holstein Friesian (Bos taurus) semen. Results obtained from in vitro analyses indicate that the encapsulation process does not have detrimental effects (compared to controls) on quality parameters (membrane integrity, progressive motility, path average velocity) in either species. Similarly, there were no detrimental effects after cryopreservation in either species. The fertilizing potential of encapsulated and cryopreserved semen was evaluated after AI in 25 buffalo and 113 bovine females. Pregnancy rates were not affected in either species. The results of this study show proof of concept for the use of frozen semen controlled-release devices in buffalo.
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Marta Cecilia Tosca,Theodora Chlapanidas,Marta Galuzzi,Barbara Antonioli,Sara Perteghella,Barbara Vigani,Melissa Mantelli,Daniela Ingo,Maria Antonietta Avanzini,Daniele Vigo,Massimo Faustini,Maria Lui 한국조직공학과 재생의학회 2015 조직공학과 재생의학 Vol.12 No.4
The aim of this work is to propose a keratinocytes (KC) culture method for clinical practice with irradiated adipose-derived mesenchymal stromal cells (ASCs) as human feeder layer, avoiding murine immortalized fibroblasts, commonly request for producing skin substitutes. ASCs were isolated, expanded, irradiated, and co-cultured with autologous or allogeneic KC. All experiments were performed using murine fibroblasts as control. Cell counts, flow cytometric analysis and ELISA were carried out, in order to define cell yield, viability and cytokine secretion. Results indicate that the optimal X-ray dose for ASCs is 120 Gy and the optimal seeding density is 625 cells/cm2; moreover, flow cytometric analysis shows that the percentage of feeder layer cells reaches values lower than 1%, within 8 days of co-culture. KC reach confluence in 6.9 days on ASCs substrate and, after confluence, the number of live cells increases again in a multilayered structure. Moreover, results show higher levels of interleukin (IL)-1α in co-culture with ASCs compared with 3T3, while no differences were observed for IL-6 and IL-8. Therefore, human ASCs enable to obtain effectively in vitro expanded KC and represent a viable alternative to murine fibroblasts for the production of clinical use skin substitutes.
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