Glass surface evolution following gas adsorption and particle deposition from indoor cooking events as probed by microspectroscopic analysis

2020 ◽  
Vol 22 (8) ◽  
pp. 1698-1709 ◽  
Author(s):  
Victor W. Or ◽  
Michael Wade ◽  
Sameer Patel ◽  
Michael R. Alves ◽  
Deborah Kim ◽  
...  
Keyword(s):  
Glass Surface ◽  
Particle Deposition ◽  
Gas Adsorption ◽  
Emission Sources ◽  
Surface Evolution ◽  
Glass Surfaces

Microspectroscopic analyses of glass surfaces following a single day of cooking events reveal organic depositions that can be traced back to emission sources and airborne distributions.

Electrokinetics, Adsorption and Colloid Study of Simulated Nuclear Waste Glasses Leached in Aqueous Solutions

1984 ◽  
Vol 44 ◽  
Author(s):  
Cheng T. Lee ◽  
D. E. Clark
Keyword(s):  
Surface Layer ◽  
Nuclear Waste ◽  
Glass Surface ◽  
Charged Particles ◽  
Electrostatic Repulsion ◽  
Surface Layers ◽  
Short Term ◽  
Chloride Solutions ◽  
Zeta Potentials ◽  
Glass Surfaces

AbstractZeta potentials of SRL-131-29.8% TOS simulated nuclear waste glasses leached in D.I. water, Al, Ca, Mg, and Zn chloride solutions at 90°C were measured as a function of leaching time. For short term leaching, the adsorption of Ca, Mg, Zn and Al reverses the glass surface potential from negative to positive. Colloids were found to be stable in D.I. water and AICl3 solutions after leaching, presumably due to the electrostatic repulsion between the glass surface and similarly charged particles. Colloids were not found in Mg, Zn or Ca chloride solutions after leaching; instead, a relatively thick metasilicate surface layer was formed on glass surfaces leached in these solutions. The concentration of Si in solution is reduced by the formation of these surface layers.

CONCLUSION While cleaned silica-based glass surfaces have similar surface compositions, their susceptibility to strongly adsorbing organic contaminant s depends strongly on the glass composition and the cleaning procedure. For the three glass species exam-ined: silica, aluminoborosilicate, and sodalime glass , the glass surfaces behave similarly after chromic acid cleaning. They show significant differences in their properties followin g a dry cleaning procedure, such as pyrolysis or UV/ozone cleaning. The cleaned silica surfaces show a high susceptibility to adsorbing or-ganic contamination following pyrolysis cleaning, while the pyrolyzed sodalime glass appears to be virtually immune to strongly adsorbing organic molecules. Py-rolyzed aluminoborosilicate glass shows an intermediate susceptibility to adsorb-ing organic contaminants. The chromic acid cleaned glass surfaces all show an in-termediate susceptibility to contamination by adsorbed organic molecules. Thus, it may be an oversimplification to consider a clean glass surface as a high energy substrate that is bound to attract ambient organic contamination. The wettability behavior of the cleaned glass surfaces showed features associ-ated with their exposed chemical functions. The non-dispersive interaction energy between glass and water as a function of pH showed evidence of charging of the surface silanol groups. The point of zero charge for these surface chemical func-tions was observed at pH 3. An estimate of the non-dispersive interaction energy between glass and water at the point of zero charge enables a reasonable estima-tion of the density of surface silanol groups on the cleaned glass. The trends ob-served for the surface charge as a function of pH correlate with the observed sus-ceptibility for adsorbing organic contamination to the cleaned glass surfaces. Charge-adsorbed surfactant monolayers indicated a negative surface charge on the cleaned glass, as expected for silica-based glass surfaces at neutral pH. The wettability of grafted self-assembled octadecylsilane monolayers indicated high quality coatings on the cleaned glass surfaces. The coating quality was identical for all three glass species following chromic acid cleaning. The UV/ozone cleaned glass surfaces showed the highest coating quality on the silica surface, followed by the aluminoborosilicate surface and the sodalime glass surface. The trends in coating quality for all chromic acid cleaned surfaces and UV/ozone cleaned surfaces correlate with those seen for susceptibility to organic contamina-tion of the cleaned glass surfaces exposed to unpurified liquid octane. REFERENCES

2003 ◽  
pp. 114-116
Keyword(s):  
Glass Surface ◽  
Chromic Acid ◽  
Point Of Zero Charge ◽  
Coating Quality ◽  
Organic Contamination ◽  
Cleaning Procedure ◽  
Silanol Groups ◽  
Acid Cleaning ◽  
Glass Surfaces ◽  
Uv Ozone

Effect of microtubule-destroying drugs on the spreading and shape of cultured epithelial cells

1985 ◽  
Vol 74 (1) ◽  
pp. 267-282
Author(s):  
L.V. Domnina ◽  
J.A. Rovensky ◽  
J.M. Vasiliev ◽  
I.M. Gelfand
Keyword(s):  
Glass Surface ◽  
Cell Shape ◽  
Medium Effects ◽  
Adhesive Surface ◽  
Lipid Films ◽  
Cultured Epithelial Cells ◽  
The Media ◽  
Glass Surfaces ◽  
Cytoplasmic Processes

The role of microtubules in the spreading of cells from the liver-derived IAR2 rat cell line was studied. Cells in the control medium seeded on a flat isotropic glass surface rapidly spread to form discoid shapes. Spreading in colcemid-containing medium was disorganized and delayed; partial reversal of spreading was observed. Nevertheless, even in the presence of colcemid the cells finally spread to discoid flattened shapes. IAR2 cells in medium without colcemid spread not to discoid but to elongated shapes under three different sets of conditions: (1) when the cells were forced to spread on narrow strips of adhesive glass surface between two non-adhesive lipid films; (2) when the cells spread on the poorly adhesive surface of poly(HEMA)-covered glass; (3) when the cells spread on the usual glass surfaces in medium containing cytochalasin D. Addition of colcemid to the media reversed the polarized spreading under the first two conditions; colcemid did not reverse the formation of the elongated cell shape acquired by the cells spreading in cytochalasin-containing medium. Effects of microtubule-destroying drugs on the spreading of epithelial and fibroblast cells are compared and discussed. It is suggested that microtubules are essential for the stabilization of the spread state of those attached cytoplasmic processes and lamellae that do not have numerous and stable-cell substratum contacts, e.g. the processes formed at the early stages of spreading or the elongated processes of polarized cells. Possibly, microtubules stabilize the non-contracted state of the actin cytoskeleton in these processes.

A NEW METHOD FOR THE APPLICATION OF LUMINESCENT SCREENS TO GLASS SURFACES

1935 ◽  
Vol 13a (6) ◽  
pp. 126-132 ◽  
Author(s):  
W. H. Kohl
Keyword(s):  
Heat Treatment ◽  
Chemical Reaction ◽  
Glass Surface ◽  
Physical Characteristics ◽  
New Method ◽  
Sintering Process ◽  
Luminescent Screen ◽  
Uniform Layer ◽  
Glass Surfaces

An outline is given of the various methods for the application of luminescent screens, and their relative merits. Most widespread in use are methods that utilize a liquid binder that enters into a chemical reaction with the glass surface. In other cases, the powder is partially imbedded in the glass surface by a sintering process. The physical characteristics of the luminescent screen are adversely affected by both of these methods. A process based on the activation of the glass surface by a deposit of sulphur is described. The sulphur coating picks up the luminescent powder in a uniform layer when it is brought into contact with the powder. After being removed by means of a moderate heat treatment, it leaves the screen firmly adhering to the glass surface. Possible mechanisms for the process are briefly discussed.

scholarly journals Modification of the glass surface by DCSBD plasma discharge to improve adhesion of decorative gold

2021 ◽  
Vol 1199 (1) ◽  
pp. 012048
Author(s):  
R Janík ◽  
V Vargová ◽  
J Šulcová ◽  
M Pajtášová
Keyword(s):  
Image Analysis ◽  
Glass Surface ◽  
Plasma Discharge ◽  
Glass Surfaces

Abstract The present work, as one of the first scientific works, deals with the modification of the glass surface induced by DCSBD plasma discharge to increase the adhesion of decorative gold layers on glass products. In the study of such a modification, it was necessary to monitor the effectiveness of the modification of the glass surface, and subsequently it was necessary to test the resistance of the deposited gold layers in tests performed directly in operation. In the present work, the adhesion of gold to DCSBD-modified glass surfaces by plasma discharge was uniquely evaluated by image analysis.

scholarly journals Environmental dust removal from inclined hydrophobic glass surface: avalanche influence on dynamics of dust particles

RSC Advances ◽  
2018 ◽  
Vol 8 (59) ◽  
pp. 33775-33785 ◽  
Author(s):  
Bekir Sami Yilbas ◽  
Abdullah Al-Sharafi ◽  
Haider Ali ◽  
Nasser Al-Aqeeli ◽  
Hussain Al-Qahtani ◽  
...  
Keyword(s):  
Glass Surface ◽  
Dust Removal ◽  
Dust Particles ◽  
Transparent Glass ◽  
Optically Transparent ◽  
Glass Surfaces

The removal of environmental dust particles from optically transparent glass surfaces is considered, and the dynamics of the dust particles on the inclined hydrophobic glass surface is examined.

Glass Surface Refining by Deposition of Nano-Particles

2013 ◽  
Vol 592-593 ◽  
pp. 329-332
Author(s):  
Marcin Drajewicz ◽  
Paweł Rokicki
Keyword(s):  
Glass Surface ◽  
Chemical Properties ◽  
Soda Lime ◽  
Nano Particles ◽  
X Ray ◽  
Spectrometry Analysis ◽  
Soda Lime Silica Glass ◽  
Glass Surfaces ◽  
Physical And Chemical ◽  
And Chemical Properties

In the paper a new surface refining technology which uses nano-particles to improve the soda – lime – silica glass surfaces is presented. The SEM-EDS (Energy Dispersive X-ray Spectrometry) analysis was carried out to determine modification of the glass surface. A very thin modification layer was observed on the glass surface. The surface modification leads to an improvement of physical and chemical properties of the investigated glass.

Nanoscale flow deformation of silicate glass ultrathin films for development of nano-patterned glass surfaces

2004 ◽  
Vol 19 (9) ◽  
pp. 2683-2686 ◽  
Author(s):  
Shusaku Akiba ◽  
Wakana Hara ◽  
Shuhei Sato ◽  
Akifumi Matsuda ◽  
Atsushi Sasaki ◽  
...  
Keyword(s):  
Thin Films ◽  
Ultrathin Films ◽  
Glass Surface ◽  
Substrate Surface ◽  
Oxide Glass ◽  
Glass Transition Point ◽  
Contact Mode ◽  
Stepped Surface ◽  
Flow Deformation ◽  
Glass Surfaces

The nanoscale behavior of high-temperature flow deformation for silicate-based oxide glass ultrathin films was characterized with focus on forming a nano-patterned glass surface. The oxide glass thin films were deposited at room temperature by pulsed laser deposition onto the ultrasmooth sapphire substrates with 0.2-nm-high atomic steps. It was found from atomic force microscopy (AFM) measurements that the silicate ultrathin films (about 3 nm thick) started to deform at a temperature 50 °C lower than the glass transition point of the bulk glass. The glass thin films annealed at high temperatures exhibited the nano-stepped surface structure reflecting the sapphire substrate surface. By scanning the AFM tip on the as-deposited glass film in a contact mode and then thermal annealing the film, we could pattern the nano-stepped glass surface at a nanoscale.

NANOSTRUCTURED DENDRIMER MODIFIED GLASS SURFACES FOR PROTEIN MICROARRAY

2007 ◽  
Vol 06 (02) ◽  
pp. 161-165 ◽  
Author(s):  
PARAYIL KUMARAN AJIKUMAR ◽  
JIN KIAT NG ◽  
JIM YANG LEE ◽  
GREGORY STEPHANOPOULOS ◽  
HENG-PHON TOO
Keyword(s):  
Glass Surface ◽  
Density Functional ◽  
Protein Microarray ◽  
Pamam Dendrimer ◽  
High Density ◽  
Protein Arrays ◽  
Nonspecific Adsorption ◽  
Cell Lysate ◽  
Modified Surface ◽  
Glass Surfaces

Carboxyl PAMAM dendrimer (3.5 generation) was covalently coupled onto amine modified glass surface to prepare a monolayer of high density functional linkers. Activation of the carboxyl PAMAM surface and the subsequent immobilization of antibodies resulted in a high density protein microarray as compared to linear carboxyl linker surface. In addition, fluorescent labeled cell lysate showed extremely low nonspecific adsorption to the PAMAM modified surface, comparable to inert PEG surface. Thus, the carboxyl PAMAM modified surface is ideal for the generation of high density protein arrays for the detection of dilute antigens with superior sensitivity.

scholarly journals Avalanche effect for chemically modified dust mitigation from surfaces

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Johnny Ebaika Adukwu ◽  
Bekir Sami Yilbas ◽  
Almaz Jalilov ◽  
Hussain Al-Qahtani ◽  
Ahmet Z. Sahin ◽  
...  
Keyword(s):  
Glass Surface ◽  
High Speed ◽  
Solution Treatment ◽  
Cost Effective ◽  
Optical Transmittance ◽  
Vital Role ◽  
Dust Particles ◽  
Avalanche Effect ◽  
Fluorine Compounds ◽  
Glass Surfaces

AbstractCost effective dust mitigation from surfaces is one of the challenges in various sectors. The reduction of dust adhesion on surfaces plays a vital role for dust mitigation from surfaces under the gravitational influence. Creating an avalanche effect on dusty surfaces improves the dust mitigation rate and provides an effective cleaning process. Hence, solution treatment of dust by low concentration hydrofluoric acid is considered towards reducing dust adhesion on glass surfaces. To increase the rate of dust mitigation, the avalanche influence is created by the higher density and larger size particles (5300 kg/m3 and ~ 50 µm) than the average size dust particles (2800 kg/m3 and 1.2 µm) via locating them in the top region of the dusty glass surfaces. Mitigation velocity of the dust particles is evaluated using a high-speed recording system and the tracker program. Findings revealed that solution treatment (curing) of the dust particles results in the formation of fluorine compounds, such as CaF2 and MgF2, on dust surfaces, which suppress dust adhesion on surfaces. OSHA Globally Harmonized System lists the fluorine compounds formed as environmentally non-harmful. Avalanche's influence results in dust mitigation at a smaller tilt angle of the glass surface (~ 52°) than that of the case with none-avalanche influence (63°). Area cleaned on the glass surface, via dust mitigation, is larger as the avalanche is introduced, which becomes more apparent for the solution treated dust particles. Dust mitigation under avalanche influence improves optical transmittance of the dusty glass samples by a factor of 98%.

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