Surface cleaning with the carbon dioxide snow jet

Sherman, Robert; Hirt, Drew; Vane, Ronald

doi:10.1116/1.579021

Cited by 105 publications

(66 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Before coating, type B substrates, cut in ca. 1 cm 2 pieces, were freed from Si dust by treatment with a CO 2 -jet [13]. The samples were then 'degreased' by sonication in ethanol, acetone and toluene.…”

Section: Dept Of Applied Physics University Of Ulm D-89069 Ulm Gementioning

confidence: 99%

Shape of a Liquid Front upon Dewetting

2001

View full text Add to dashboard Cite

We examine the profile of a liquid front of a film that is dewetting a solid substrate. Since volume is conserved, the material that once covered the substrate is accumulated in a rim close to the three phase contact line. Theoretically, such a profile of a Newtonian liquid resembles an exponentially decaying harmonic oscillation that relaxes into the prepared film thickness. For the first time, we were able to observe this behavior experimentally. A non-Newtonian liquid -a polymer melt -however, behaves differently. Here, viscoelastic properties come into play. We will demonstrate that by analyzing the shape of the rim profile. On a nm scale, we gain access to the rheology of a non-Newtonian liquid. 68.15.+e, 47.20.Ma, 47.54.+r, 68.37.PS

show abstract

Section: Dept Of Applied Physics University Of Ulm D-89069 Ulm Gementioning

confidence: 99%

Shape of a Liquid Front upon Dewetting

2001

View full text Add to dashboard Cite

show abstract

“…A combination of the excellent solvent properties of CO 2 , its low temperature and the momentum imparted by the crystals facilitates the cleaning. 22 Until now, the process has been used purely as a cleaning technique, principally on flat silicon surfaces where it has widespread industrial use in the silicon electronics industry. Here, we extend and study its use for cleaning nanostructured SERS substrates and as a tool for inducing transient perturbations to the SERS process allowing us to track short-term changes to the strength of the SERS signal and background.…”

Section: Introductionmentioning

confidence: 99%

Disentangling the Peak and Background Signals in Surface-Enhanced Raman Scattering

2012

View full text Add to dashboard Cite

Understanding the complex relationship between peak enhancement and the underlying broad continuum (called the "background") is crucial for developing reliable and quantitative applications of surface-enhanced Raman scattering (SERS). Here we use a gentle mechanochemical ("snow jet") process to perturb molecules on a SERS active substrate to track the dynamics of the different contributions to SERS. By use of the snow jet process we are able to increase SERS signals on substrates by 500% or more while simultaneously increasing the peak:background intensity ratio. We identify components of the signal arising from changes in molecular distribution and surface morphology using a multiplexed time-varied exposure technique developed in-house. This allows us to distinguish between processes decaying over time and those decaying due to laser heating. Our study goes a long way toward disentangling the different contributions to SERS peak and background continuum signals and points to the different origins of these two co-occurring processes on nanostructured plasmonic substrates. This deeper understanding of the SERS process is crucial to allow SERS to reach its full potential.

show abstract

“…Liquid CO 2 also has good solvent properties, meaning it can effectively remove hydrocarbons from the surface. This method has the advantages that it doesn't cause any damage to the surface and is residue free [23,24].…”

Section: Jet Methodsmentioning

confidence: 99%

A Review of Outgassing and Methods for its Reduction

Grinham

Chew

2017

Appl. Sci. Converg. Technol.

View full text Add to dashboard Cite

There are several contributions to the gas load of a system of which often the most important is outgassing. Adsorption occurs via two main processes, physisorption and chemisorption, and can be described using five (or six) classifying isotherms. Outgassing is the result of desorption of previously adsorbed molecules, bulk diffusion, permeation and vapourisation. Looking at the desorption rate, pumping speed and readsorption on surfaces, the net outgassing of the system can be calculated. There is significant variation in measured outgassing rates between different materials but also between published rates for the same materials, in part due to the number of different methods used to measure outgassing. This article aims to review the outgassing process, outgassing rates, measurement methods and techniques that can be used to reduce the outgassing of a system.

show abstract

Surface cleaning with the carbon dioxide snow jet

Cited by 105 publications

References 0 publications

Shape of a Liquid Front upon Dewetting

Shape of a Liquid Front upon Dewetting

Disentangling the Peak and Background Signals in Surface-Enhanced Raman Scattering

A Review of Outgassing and Methods for its Reduction

Contact Info

Product

Resources

About