Quotations


 Thought for us


Penetrating so many secrets, we cease to believe in the unknowable.

But there it sits nevertheless, calmly licking its chops.


                                           H L Mencken



Optimum NEMS/MEMS Electronics Circuit Design

by

Quantum Mechanics
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By QM, the optimum NEMS/MEMS electronics circuit design in relation to hot spots and 1/f noise may be udnerstood by the size d of the circuit element in relation to the wavelength of EM confinement given by TIR. QM stands for quatnum mechanics, EM for electromagnetic, and TIR for total internal reflection. Taking the size d as the half wavelength of TIR confinement, the NEMS region is for d < 0.07 microns while MEMS is for d > 1 microns. In NEMS, there are no hot spots, but 1/f noise is created.; wheras, for MEMS, there is no 1/f noise, but hot spots may occcur. The optimum circuit design is the region between NEMS and MEMS where there are no hot spots and 1/f noise. See Paper and PressRelease


 
Nanobubbles by Quantum Mechanics

Nanobubbles are air-containing cavities in liquid water with surface molecules in a continual state of evaporation and condensation. Bubbles grow or shrink by diffusion according to whether the surrounding solution is over or under-saturated with air relative to the pressure. As the solubility of gas is proportional to the Laplace pressure that increases as the diameter decreases, there is increasing tendency for bubbles to reduce in size and dissolve in a few microseconds. However, nanobubbles are observed on submerged surfaces for days, defying the expectation of prompt dissolution.

Recently, the stability of nanobubbles is thought to come from the slow rate of dissolution of gas into the surrounding saturated liquid, i.e., the bubble gas cannot enter the surrounding liquid unless it can be transferred through the entire liquid. Depending on the thickness of the liquid layer, the diffusion can take many hours rather than fractions of a second. The dissolution is slowed down further by the fact that the edge of a nanobubble – where gas, liquid and solid meet – is typically ‘pinned’ in place and does not change over time. 

However, the slow dissolution of gas into the liquid as the mechanism for nanobubble stability is not without controversy. Slow dissolution should show the bubbles ever so slightly shrinking over time, but this is not observed.  Measurements of bubble height h over time for different liquid volume samples are recommended for confirmation. Regardless, it is unlikely if the liquid samples are all truly supersaturated, there should [2] not be any difference in the bubble dissolution.

The most likely reason for the stability of nanobubbles is the surface is continually being charged inducing an opposing force to the surface tension, thereby slowing their dissolution. It is clear that the presence of like charges at the interface will reduce the apparent surface tension, with charge repulsion acting in the opposite direction to the surface minimization due to surface tension. Simply put, surface tension tends to dissolve the bubble while surface charge tends to expand the bubble. Based on self-ionization of the water molecule, the bubble charge is thought to be negative hydroxyl ions while positive hydronium.dominate the bulk.

However,self-orgnaization occurs at a very unlikely probability. A far more fficent conversion to hyronium an dhydroxyl ions is required, In this regard, QM allows robust charging as air and water molecules continually evaporate and condense on the nanobubble surface. QM stands for quantum mechanics. On the bubble surface, the molecules have thermal kT energy, as they are a part of the liquid continuum. But once the molecules leave and enter the EM confinement of the bubble, QM precludes the molecules from having the heat capacity to conserve their kT energy by an increase in bubble gas temperature. EM stands for electromagnetic. Instead, conservation proceeds by QED creating photons at the TIR mode of the bubble surface. QED stands for quantum electrodynamics and TIR for total internal reflection. The Planck energy E of the QED radiation is significant, E > 60 eV compared to the 12.6 eV ionization potential of the water molecule. thereby providing  the nanobubble with a continuous source of  hydronium and hydtroxyl ions.

See Presentation, Paper and PressRelease

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Cooling of Macrostructures by Nanoscale Coatings
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Macrostructures cool by conduction, radiation, and convection. However, by simply applying a nanoscale coating to macrostructures, cooling is dramatically enhanced. However, classical physics that requires the same heat capacity of the atom for all coating thicknesses does not predict any enhancement for nanoscale coatings. Instead, the enhancement is explained by QM that by requiring the heat capacity of the atom in nanoscale coatings to vanish precludes the conservation of heat by the usual increase in temperature. QM stands for quantum mechanics. Instead, macrostructures cool as the heat into the coating under TIR is induced by QED to create non-thermal EM radiation thereby producing excitons (holon and electron pairs)  that upon recombination enhance heat transfer by emitting the heat as EM radiation to the surroundings. TIR stands for total internal reflection, QED for quantum electrodynamics, and EM for electromagnetic. QED cooling applications are discussed for electronics and gas turbine blades. See Paper and PressRelease

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 Cooling of Nanoelectronics by QED

 Automobile engines cooled by radiators with circulating water are based on pool-boiling that began with the Industrial Revolution. Recently, researchers have claimed heat transfer based on pool-boiling experiments using water against porous 50 – 150 nm zinc oxide coatings may be made 10X more efficient than bare aluminum and copper surfaces. Indeed, nanostructured heat transfer surfaces are thought to supersede the traditional cooling fin. The increased area provided by the porosity of the nanoscale coating is given to explain pool-boiling heat transfer enhancement.

However, the notion that porosity increases the heat transfer area in pool-boiling is one of classical physics that assumes temperature changes occur in the coating irrespective of its thickness. But QM and not classical physics is applicable to nanoscale coatings, porous zinc oxide or otherwise. QM stands for quantum mechanics. QM differs from classical physics by requiring the heat capacity of the atom to vanish in nanoscale coatings thereby precluding the conservation heat flow into the coating by an increase in temperature. Instead, conservation proceeds by the creation of QED induced non-thermal EM radiation. QED stands for quantum electrodynamics and EM for electromagnetic.

Enhancement of heat transfer over bare surfaces therefore occurs as QED induced radiation is emitted from the coating and absorbed in the water surroundings. Even water coolant, let alone pool-boiling are not required as the emission of QED radiation from zinc oxide coatings may be air cooled from the ambient surroundings, the latter notion of great interest in cooling electronics. Indeed, air cooling by coating conventional electronics circuit elements with nanoscale zinc oxide or other suitable materials is especially attractive and perhaps the only possible way to cool submicron circuit elements in nanoelectronics. The emission of QED radiation from nanoscale coatings is not new, having been mistaken in thin films as reductions in thermal conductivity that continue to this day, examples of which are presented from the literature. See Paper and Presentation 



QED Cooling of Gas Turbine Blades

 Recent advances in cooling electronics by applying nanoscale coatings to circuit elements suggest gas turbine blades may be similarly cooled. Unlike TBC that insulate the blade from high temperature, QED cools the blade by converting heat to non-thermal EM radiation that is dissipated to the surroundings. TBC stands for thermal barrier coatings, QED for quantum electrodynamics and EM for electromagnetic.

QED cooling finds basis in Planck's QM given in terms of temperature and TIR confinement by the Einstein-Hopf relation for the atom as a harmonic oscillator. QM stands for quantum mechanics and TIR for total internal reflection. Under the TIR confinement in nanoscale coatings, the heat capacity of the atom vanishes, and therefore the coating cannot conserve blade heat by the usual increase in temperature.  Instead, conservation proceeds by the QED induced frequency up-conversion of blade heat to non-thermal EM radiation at the TIR confinement frequency of the TBC coating.  The only TIR requirement is the RI of the TBC be greater than that of the blade material.  RI stands for refractive index. TIR confinement is the natural consequence of the high surface to volume ratio of nanoscale TBC that concentrate the blade heat almost totally in the TBC surface. However, the TIR confinement is not permanent, sustaining itself only during the absorption of blade heat.

In this way, the blade is cooled as the TBC converts the blade heat into QED induced EM radiation that is emitted and absorbed in the surroundings. QED cooling is passive avoiding   the complexity of fin and internal cooling while transferring the heat from the blades by the emission of EM radiation to the ambient surroundings. QED cooling by nanoscale coatings is not new, having been mistaken for some time in thin films as reductions in thermal conductivity, examples of which are presented from the literature. QED cooling of turbine blades by nanoscale TBCs is expected to be a hot topic at ASME Turbo 2014. See Paper 



Redshift in Cosmic Dust


DUST 2014, the International Conference on Atmospheric Dust is directed to the world of the atmospheric particles. Beyond our atmosphere, cosmic dust comprising nanoparticles of primarily silicon permeate the vast reaches of the Universe. Like atmospheric dust obscurring observations of what we perceive on Earth, our optical observations of the Universe are distorted by cosmic dust.

In 1929, Edwin Hubble formulated the law that the velocity of a receding galaxy is proportional to its distance to the Earth. Hubble based his law on Doppler's effect whereby the wavelength of light from the galaxy is redshift if the galaxy is moving away from us. Thus, by measuring the redshift of known spectral lines, Hubble claimed to know the recession velocity of the galaxy relative to the Earth.

Based on the redshift of supernova light, astronomers now take Hubble's law as proof the Universe is not only expanding, but accelerating. If, however, the redshift has a non-Doppler origin, the Universe need not be expanding, let alone accelerating. Redshift without an expanding Universe is of utmost importance because many of the outstanding problems in cosmology would be simply resolved by Newtonian mechanics.

 In this regard, redshift of galaxy light may occur upon absorption in submicron cosmic dust NPs by the mechanism of QED induced EM radiation. NP stands for nanoparticles, QED for quantum electrodynamics, and EM for electromagnetic. QED induced redshift may be understood by treating the absorbed photon as EM energy confined within the NP by TIR. TIR stands for total internal reflection. TIR confinement is a consequence of the submicron NPs having high surface to volume ratios, and therefore the absorption of the galaxy photon is therefore almost entirely confined to the NP surface corresponding its TIR mode. Since quantum mechanics precludes conservation of the absorbed galaxy photon by an increase in NP temperature, conservation proceeds by the QED induced creation of a redshift photon depending on the NP material and geometry.

The QED induced redshift is caused solely by the absorption of the galaxy photon in NPs and has nothing to do with an expanding Universe. Given that galaxy and supernova light is unequivocally absorbed by NPs on its way to the Earth, the Hubble redshift is highly likely not related to an expanding Universe. It therefore follows that an accelerating Universe expansion by dark energy based on Doppler shift is unphysical. Indeed, NPs hold in question the Hubble redshift as proof the Universe began in the Big Bang suggesting the notion once proposed by Einstein of a static Universe in dynamic equilibrium is a far more credible cosmology.  Other consequences are:
 
Dark Energy not needed to explain a Universe that is not expanding,
Dark Matter not source of Gravitational Lensing,
Galaxy Rotation Problem resolved without Dark Matter, etc.

See Paper and Press Release

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QED - The Fourth Mode of Heat Transfer

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Automobile engines have been water cooled by pool-boiling heat exchange since the Industrial Revolution. However, researchers have recently found pool-boiling heat transfer using porous 50 – 150 nm zinc oxide coatings are 4-10X more efficient than for bare aluminum and copper surfaces. Indeed, nanostructured heat transfer surfaces in pool-boiling may revolutionize cooling technology by making the traditional cooling fin obsolete. The mechanism of pool-boiling heat transfer enhancement is thought to be the increased area from the porous flower-like microstructure of zinc oxide.

However, to take advantage of the increased area, the temperature of the coating must increase with the heat of pool-boiling. But QM requires the heat capacity of the atom in nanoscale coatings under TIR confinement to vanish, and therefore the heat into the coating is not conserved by an increase in temperature. QM stands for quantum mechanics and TIR for total internal confinement. Instead, the heat as EM energy is conserved by the creation of QED induced non-thermal EM radiation inside the zinc oxide coating. QED stands for quantum electrodynamics and EM for electromagnetic.  By QM, enhanced pool-boiling occurs as the heat into the coating under TIR confinement creates QED radiation that bypasses the inefficient heat transfer boiling process at the coating surface to be directly absorbed in the bulk coolant water. 

Alternatively, QED cooling allows pool-boiling to be avoided altogether by transferring the heat to ambient air.  In this regard, QED cooling in air by nanoscale coatings is of great interest as thermal management of conventional electronics using nanoscale coatings is far simpler to implement than cooling fins or pool-boiling. In nanoelectronics, QED cooling in air by nanoscale coatings of zinc oxide or the like may be the only way to manage the temperature of sub-micron circuit elements because of the limited space available. QED cooling of nanoscale coatings is not new, having been mistaken in thin films as reductions in thermal conductivity, examples of which are presented from the literature.

Extensions are made to diverse areas of physics and astronomy to show how man through QM and QED may better understand the world in which he lives.

See  Paper and Press Release

Nanochannel Flow
 

Water flow through nanochannels of carbon nanotubes has been observed to be 2-5 orders of magnitude higher than predicted by the Hagen-Poiseuille theory of fluid mechanics that assumes the fluid does not slip at the channel wall. However, the general consensus is high flow is caused by fluid slip. But slip is questionable as the calculated slip-lengths for water in nanotubes exceeds the typical slip on non-wetting surfaces by 2 to 3 orders of magnitude. Hence, slip at the channel wall is an unlikely explanation for flow enhancement in nanochannels.

MD is commonly used to explain enhanced nanochannel flow. However, the MD simulations are not valid because QM precludes the atom from having the heat capacity to conserve viscous heating by an increase in temperature. QM stands for quantum mechanics. Instead, QED induces atoms in fluid molecules under the TIR confinement of the nanochannel to conserve viscous heat by the creation of EM radiation. QED stands for quantum electrodynamics, TIR for total internal reflection, and EM for electromagnetic. Standard MD computer programs require modification to simulate the QM effect in nanochannels.

In this regard, MD that is valid by QM is used to simulate a 2D model of 100 atoms in a BCC configuration of liquid argon under a constant shear stress as shown in the above figure..The L-J potential is chosen to have sigma = 3.45 A and epsilon = 120 k, k is Boltzmann´s constatn. The MD loading of a velocity gradient normal to the flow direction having velocity of 100 m/s over the MD box height of 32.6 A.

After 150000 iterations, the L-J viscosity converged to ~ 144 micro-Pa-s. Experimentally, the viscosity of liquid argon depends on temperature and varies vary from 54 to 175 micro-Pa-s. But closer agreement is not important as the issue is what happens in the MD solution as the attractve L-J potential vanishes. In this regarrd, the attractive L-J potential was reduced by a factor of 100 to 1.2 k. The MD solution was found to give the viscosity of 1 micro-Pa-s that relative to MD solution for an attractive L-J potentia of 120 k gave a viscosty reduction by a factor of 144.

Moreover, the MD solution for Coulomb repulsion was also performed and found to converge to a zero viscosity . Both MD solutions suggest a vanishing viscosity is inherent in nanochannels.  See Paper and Press Release


The Bernoulli equation and nanochannels

Flow through nanochannels of CNTs is observed to be 2-5 orders of magnitude higher than predicted by the Hagen-Poiseuille equation. CNT stands for carbon nanotube. However, the disparity with experiment cannot be explained by slip at the wall. In this regard, MD simulations of liquid argon valid by QM show flow enhancement to occur because the viscosity vanishes in nanochannels. QM stands for quantum mechanics. See Press Release

Vanishing viscosity occurs because QED conserves the viscous heat in the nanochannel by creating EM radiation that ionizes the fluid molecules to produces a flow of charged atoms as depicted in the above figure. The charged atoms.under Coulomb repulsion separate more than usual to give a vanishing viscosity. QED induced charged flow in nanochannels should therefore approach rhe frictionless flow given by the Bernoulli equation.

The Bernoulli equation for the mass flow through nanochannels follows from the QED energy equation that excludes temperature changes as required by QM. Indeed, the Bernoulli equation provides a reasonable QM approximation to the flow in nanochannels that avoids the complexity of MD solutions. With the exception of water, the measured flow is close to but less than that predicted by the Bernoulli equation. See data in Paper on "The end of nanochannels"

The frictionless Bernoulli equation is far simpler than performing MD simulations, even if one sets aside the fact that standard MD programs give meaningless results because of their QM invalidity. However, if MD programs are corrected for QM, valid MD solutions for nanochannel flow may be obtained but still the MD cannot be justified compared to the utter simplicity of the Bernoulli equation. Press Release


The Interphase in Nanocomposites

Nanocomposites comprising NPs embedded in a polymer are observed to display significantly enhanced mechanical properties compared to the polymer alone without NPs. NP stands for nanoparticle. In the above figure, the EUV emission from the NP is shown (green) to cross-link the interphase adjacent the NP. Enhanced properties are attributed to the interphase comprising a thin < 100 nm polymeric region that forms adjacent the NPs. Since NPs are typically < 10 nm, the interphase controls the properties of nanocomposites.

Experiments are required to determine the properties of the interphase, but tensile tests of nanoscale specimens of the interphase are difficult to perform. Because of this, atomistic MD simulations are used to deerve interphase properties. However, the validity of the MD simulations is questionable as assumptions are usually unverifiable, e.g., the source of radicals in initiating cross-linking and the correctness of force-fields lack experimental support. Except for illustrating how the MD procedure would be performed if the assumptions of the interphase were indeed valid, the interphase remains uncharacterized.

In the alternative, the NPs in a polymer are proposed to emit EUV radiation that cross-links the polymer adjacent to the NP surface to form the interphase thereby enhancing the mechanical properties of nanocomposites. EUV stands for extreme ultraviolet. 

The EUV radiation emitted from NPs is not new, having been known for some time as a major source of DNA damage that if not repaired may lead to cancer. Press Release

Characterization of the mechanical properties of the intrerphase is proposed based on uniaxial tensile tests of EUV irradiated polymer tensile specimens. See Paper and Press Release

Briefly, the characterization procedure:

1. Prepare polymer tensile specimens, say < 1 mm diameter wires or 3 micron thick flat geometries. The polymer specimens are samples of the natural polymer which is not yet cross-linked.

2. For the nanocomposite application, determine the wavelength of the EUV emission expected from the NPs based on their diameter and refractive index. Typical EUV sources are capable of providing fluences F < 70 mJ/cm2. Adjust F < 2 mJ/cm2 and run at ambient temperature for various duration times.

3. Perform tensile tests of the EUV irradiated specimens. Determine the stress-strain curve of the natural and EUV irradiated polymer, i.e., Young's modulus and yield strength.

4. Use the EUV irradiated specimens in ANSYS or the like FEM simulations of the nano-composite to determine structural integrity. Or in MD simulations verify that force-fields do indeed give the experimental EUV irradiated stress-strain curve before applying to structural evaluations.

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 Nanobubbles in acid-base chemistry

  In 1955, Eigen and de Maeyer initiated acid-base chemistry by assuming water molecules dissociate into H and OH ions through self-ionization. Recently, MD simulations have proposed self-ionization is the consequence of electric fields caused by random fluctuations that about once every 10 hours are strong enough to dissociate the water molecule by breaking an O-H bond producing a OH and hydronium H3O ion. In this way, self-ionization defines the concentration of H3O ions by the pH of water.

However, self-ionization is contrary to the Boltzmann distribution that gives the probability of dissociating the water molecule as the natural exponential e raised to the –(E/kT)power. Here, E is the dissociation energy and kT is the available thermal energy, where k is Boltzmann’s constant and T absolute temperature. Dissociation of the water molecule requires EM energy of at least 5 eV. Classically, kT = 0.0258 eV at ambient temperature giving e^–E/kT = 1^-84, a very small number that has been translated into a water molecule dissociating once every 10 hours.

Unfortunately, the thermal kT energy of the atom given by classical physics is only applicable to the low frequency anharmonic region of the QM harmonic oscillator, but not to the high frequency harmonic region of the O-H bond. QM stands for quantum mechanics. In fact, the Einstein-Hopf relation for the QM harmonic oscillator shows the kT energy of the atom vanishes at O-H bond frequencies, and therefore e^–E/kT = 0 meaning the water molecule does not dissociate once every 10 hours, but rather never dissociates. Similarly, the MD simulation that implicitly assumes kT > 0 is also invalid as kT vanishes. Regardless, self-ionization cannot occur, yet the water molecule is indeed dissociating as pH measurements are routinely measure H3O concentrations.

What is the mechanism by which water molecules are continually dissociating?  

In this regard, nanobubble dissociation of water is proposed as the source of H3O ions that define the pH of water. Nanobubbles are nearly spherical < 100 nm air-containing cavities in liquid water. Generally, bubbles collapse by surface tension that increases as the diameter decreases, and therefore nanobubbles are thought to dissolve in a few microseconds. Contrarily, nanobubbles are known to remain stable for hours and even days, defying the expectation of prompt dissolution.  Recently, the stability of nanobubbles is shown to depend on the charge repulsion of OH ions in the bubble that opposes surface tension, while the H ions form hydronium H3O ions in the bubble wall.

In nanobubbles, water molecules are continually evaporating from the bubble wall.  In the bubble wall, the water molecules have thermal kT energy, as they are a part of the macroscopic liquid continuum. But in the EM confinement of the bubble, QM precludes all water molecules including H and OH ions from having the heat capacity to increase in temperature. Conservation of the thermal energy of the evaporated water molecules therefore cannot proceed by an increase in bubble temperature, and instead proceeds by the creation of QED induced non-thermal EM radiation. QED stands for quantum electrodynamics. For nanobubbles < 100 nm, the EM radiation induced by QED is in the UV at wavelengths < 250 nm.

With ubiquitous nanobubbles throughout the bulk producing UV radiation, acid-base chemistry differs that given by self-ionization. All water molecules that evaporate into the bubble are therefore dissociated by UV into H and OH ions. However, recombination produces an intermediate state of water that promptly ionizes in the bubble. The repetitive process in forming H3O ions from intermediate H2O molecules is illustrated in the above figure. In this plasma-like state, the nanobubbles constantly emit UV radiation that propagates throughout the bulk and upon absorption ionizes water molecules into H and OH ions. Unlike self-ionization which cannot occur, nanobubble dissociation of water is highly likely. In the bulk, the H and OH ions are not confined as in the bubble and recombination is therefore unlikely. The Hions having high fragment velocity separate from the relatively stationary OH ion to form H3O ions that having lifetime of ~1 ps allow pH measurements of the bulk to be made. See Press Release, Paper, and Presentation.    

 

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