The adsorption of progesterone onto mineral surfaces imaged with high-resolution atomic force microscopy

2008 ◽  
Vol 72 (1) ◽  
pp. 419-424
Author(s):  
B. Goritschnig ◽  
K. R. Hallam ◽  
T. McMaster ◽  
V. Ragnarsdottir
Keyword(s):  
Aqueous Solution ◽  
Atomic Force Microscopy ◽  
High Resolution ◽  
Uv Light ◽  
Pyrolytic Graphite ◽  
Ultra Violet ◽  
Mineral Surfaces ◽  
Force Microscopy ◽  
Atomic Force

AbstractAtomic force microscopy (AFM) has been used to monitor the appearance and behaviour of the hormone progesterone on mineral surfaces, including mica and highly oriented pyrolytic graphite (HOPG). Different solvents have been used resulting in various features on the two substrates. After the application of 254 nm ultra-violet (UV) light, changes in structure of the adsorbed hormone have been observed. To understand the reactions at the progesterone-mica interface in aqueous solution, adsorption has been studied in situ with AFM.

scholarly journals UV Irradiated Graphene-Based Nanocomposites: Change in the Mechanical Properties by Local HarmoniX Atomic Force Microscopy Detection

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 962 ◽  
Author(s):  
Liberata Guadagno ◽  
Carlo Naddeo ◽  
Marialuigia Raimondo ◽  
Vito Speranza ◽  
Roberto Pantani ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Mechanical Stability ◽  
Uv Light ◽  
Ultra Violet ◽  
Graphene Nanoplatelets ◽  
Free Standing ◽  
Force Microscopy ◽  
Atomic Force ◽  
Acquisition Mode

Epoxy based coatings are susceptible to ultra violet (UV) damage and their durability can be significantly reduced in outdoor environments. This paper highlights a relevant property of graphene-based nanoparticles: Graphene Nanoplatelets (GNPs) incorporated in an epoxy-based free-standing film determine a strong decrease of the mechanical damages caused by UV irradiation. The effects of UV light on the morphology and mechanical properties of the solidified nanocharged epoxy films are investigated by Atomic Force Microscopy (AFM), in the acquisition mode “HarmoniX.” Nanometric-resolved maps of the mechanical properties of the multi-phase material evidence that the incorporation of low percentages, between 0.1% and 1.0% by weight, of graphene nanoplatelets (GNPs) in the polymeric film causes a relevant enhancement in the mechanical stability of the irradiated films. The beneficial effect progressively increases with increasing GNP percentage. The paper also highlights the potentiality of AFM microscopy, in the acquisition mode “HarmoniX” for studying multiphase polymeric systems.

High resolution imaging of mitochondrial membranes by in situ atomic force microscopy

RSC Advances ◽  
2013 ◽  
Vol 3 (3) ◽  
pp. 708-712 ◽  
Author(s):  
Yongmei Tian ◽  
Jiahan Li ◽  
Mingjun Cai ◽  
Weidong Zhao ◽  
Haijiao Xu ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
High Resolution ◽  
High Resolution Imaging ◽  
Mitochondrial Membranes ◽  
Force Microscopy ◽  
Atomic Force ◽  
Resolution Imaging
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