New metal-organic nanomaterials synthesized by laser irradiation of organic liquids

2014 ◽  
Author(s):  
Stanislav L. Kuzmin ◽  
Michal J. Wesolowski ◽  
Walter W. Duley
Keyword(s):  
Laser Irradiation ◽  
Organic Liquids ◽  
Metal Organic ◽  
Organic Nanomaterials

scholarly journals Metal–Organic Framework-Based Chemo-Photothermal Combinational System for Precise, Rapid, and Efficient Antibacterial Therapeutics

Pharmaceutics ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 463 ◽  
Author(s):  
Wu ◽  
Fu ◽  
Zhou ◽  
Wang ◽  
Feng ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Photothermal Therapy ◽  
Metal Organic Framework ◽  
Global Public Health ◽  
Zeolitic Imidazolate Frameworks ◽  
Porous Carrier ◽  
Metal Organic ◽  
Organic Framework

Rapid increase of antimicrobial resistance has become an urgent threat to global public health. In this research, since photothermal therapy is a potential antibacterial strategy, which is less likely to cause resistance, a metal–organic framework-based chemo-photothermal combinational system was constructed. Zeolitic imidazolate frameworks-8 (ZIF-8), a porous carrier with unique features such as high loading and pH-sensitive degradation, was synthesized, and then encapsulated photothermal agent indocyanine green (ICG). First, ICG with improved stability in ZIF-8 (ZIF-8-ICG) can effectively produce heat in response to NIR laser irradiation for precise, rapid, and efficient photothermal bacterial ablation. Meanwhile, Zn2+ ions released from ZIF-8 can inhibit bacterial growth by increasing the permeability of bacterial cell membrane and further strengthen photothermal therapy efficacy by reducing the heat resistance of bacteria. Study showed that bacteria suffered from significant changes in morphology after treatment with ZIF-8-ICG under laser irradiation. The combinational chemo-hyperthermia therapy of ZIF-8-ICG could thoroughly ablate murine subcutaneous abscess induced by methicillin-resistant Staphylococcus aureus (MRSA), exhibiting a nearly 100% bactericidal ratio. Both in vitro and in vivo safety evaluation confirmed that ZIF-8-ICG was low toxic. Overall, our researches demonstrated that ZIF-8-ICG has great potential to be served as an alternative to antibiotics in combating multidrug-resistant bacterial pathogens.

Metal–Organic Nanomaterials for Drug Delivery

2020 ◽  
pp. 79-95
Author(s):  
Chung-Hui Huang ◽  
Pengyu Chen ◽  
X. Michael Liu ◽  
Feng Li
Keyword(s):  
Drug Delivery ◽  
Metal Organic ◽  
Organic Nanomaterials

Formation of diamond-like carbon by fs laser irradiation of organic liquids

2009 ◽  
Vol 18 (5-8) ◽  
pp. 999-1001 ◽  
Author(s):  
A. Hu ◽  
J. Sanderson ◽  
Y. Zhou ◽  
W.W. Duley
Keyword(s):  
Laser Irradiation ◽  
Organic Liquids ◽  
Diamond Like Carbon ◽  
Fs Laser

Preparation of YBa2Cu3O7−δ thin film by laser-assisted metal-organic chemical vapor deposition using highly volatile fluorocarbon-based Ba source

1996 ◽  
Vol 11 (11) ◽  
pp. 2698-2702 ◽  
Author(s):  
Yasuyuki Mizushima ◽  
Izumi Hirabayashi
Keyword(s):  
Chemical Vapor Deposition ◽  
Laser Irradiation ◽  
Vapor Deposition ◽  
Ybco Film ◽  
Chemical Vapor ◽  
Reaction Chamber ◽  
Organic Chemical ◽  
Krf Laser ◽  
Metal Organic ◽  
Organic Chemical Vapor Deposition

Superconducting oxide films of YBa2Cu3O7−δ (YBCO) were produced on magnesia (MgO) single crystalline substrates (100) by laser-assisted metal-organic chemical vapor deposition. The highly volatile Ba(hfa)2 · tetraglyme was used as a Ba source metal-organic material. Smoother surface YBCO film was obtained with KrF laser irradiation than without. However, KrF laser irradiation does not lower the temperature for formation of YBCO(123) phase. YBCO film prepared at 750 °C on the MgO substrate showed a Tc(R = 0) of 69 K, and that prepared with KrF laser irradiation was 85 K. When water was added to the reaction chamber, barium fluoride was reduced and the YBCO formation was detected at a temperature of 650 °C and higher. YBCO film prepared at the temperature of 700 °C for 40 min without KrF laser irradiation behaves as a semiconductor, and one prepared with laser irradiation showed a Tc(R = 0) of 78 K.

Generation of hydrogen under laser irradiation of organic liquids

2018 ◽  
Vol 48 (8) ◽  
pp. 738-742 ◽  
Author(s):  
I.V. Baymler ◽  
E.V. Barmina ◽  
A.V. Simakin ◽  
G.A. Shafeev
Keyword(s):  
Laser Irradiation ◽  
Organic Liquids

Cryosynthesis and properties of metal-organic nanomaterials

1999 ◽  
Vol 12 (5-8) ◽  
pp. 1113-1116 ◽  
Author(s):  
G.B. Sergeev ◽  
A.V. Nemukhin ◽  
B.M. Sergeev ◽  
T.I. Shabatina ◽  
V.V. Zagorskii
Keyword(s):  
Metal Organic ◽  
Organic Nanomaterials

Preparation and growth mechanism ofa-axis-oriented YBa2Cu3O7-δ films by laser metal-organic chemical vapor deposition

1994 ◽  
Vol 9 (5) ◽  
pp. 1067-1081 ◽  
Author(s):  
Takahisa Ushida ◽  
Hiroyuki Higa ◽  
Kazutoshi Higashiyama ◽  
Izumi Hirabayashi
Keyword(s):  
Chemical Vapor Deposition ◽  
Laser Irradiation ◽  
Vapor Deposition ◽  
Film Surface ◽  
Chemical Vapor ◽  
Organic Chemical ◽  
Uv Laser ◽  
Axis Orientation ◽  
Metal Organic ◽  
Organic Chemical Vapor Deposition

Recently we have found a very effective method for controlling the orientation of YBCO films by metal-organic chemical vapor deposition (MOCVD) using uv laser irradiation during deposition onto a MgO(100) substrate. The irradiated part was stronglya-axis-oriented normal to the surface of the substrate for films prepared at 650-700 °C, whereas the unirradiated parts showedc-axis or (110) orientation. This phenomenon occurs not only on MgO(100) substrates but also on other substrates. We obtained aTcabove 81 K on thea-axis oriented part. The critical current density was over 105A/cm2at 4.2 K and O T. The surface morphology depends on the laser power density and the repetition rate. A high degree of thea-axis orientation is obtained only by using uv light during deposition of YBCO film. IR or a visible laser causes only surface melting and the destruction of film orientation. We propose that the nuclei fora-axis orientation are formed by the aggregation of Ba caused by uv laser irradiation near the film surface.

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