scholarly journals Fabrication of Stretchable Transparent Electrode by Utilizing Self-Induced Vacuum Force

2019 ◽  
Vol 9 (23) ◽  
pp. 4986
Author(s):  
Lee ◽  
Shim ◽  
Bae ◽  
Yoo
Keyword(s):  
Transparent Electrode ◽  
Thermal Curing ◽  
Electric Conductor ◽  
Fabrication Cost ◽  
Stretchable Electrode ◽  
Plate Heating ◽  
High Vapor ◽  
Effective Transfer ◽  
Heating Direction

The key challenge in fabricating a stretchable transparent electrode is the effective transfer of an electric conductor to a stretchable substrate. To this end, we used vacuum force to fully permeate the elastomer substrate into the electric conductor. The vacuum force was self-induced from the evaporation of the solvent in the electric conductor. Hence, a solvent, having a high evaporation rate, is postulated to exhibit superior fabrication quality. To demonstrate this, three different solvents were tested for preparation of the conductor slurry. In the test, the high-vapor-pressure solvents resulted in the superior quality of the fabricated stretchable electrode. Furthermore, the heating direction was changed during thermal curing to maximize the self-induced vacuum force. The plate-heating curing exhibited better transferring efficiency of the electric conductor because the evaporation of the solvent in the conductor slurry was accelerated faster than that of the thermal curing of the elastomer substrate. Besides the achieved high quality of the electrode, the fabrication cost can be drastically reduced because the extra process required to dry the electric conductor is omitted by simultaneous curing of the electric conductor and the stretchable elastomer substrate.

TRANSFER OF COMPETENCES (FROM THEORY TO PRACTICE) FOR HEALTH PROFESSIONALISTS

2018 ◽  
Vol 28 (2) ◽  
pp. 663-669
Author(s):  
Hristina Milcheva ◽  
Pavlina Teneva ◽  
Katya Mollova ◽  
Albena Andonova
Keyword(s):  
Medical Science ◽  
Medical Laboratory ◽  
Teaching Staff ◽  
Practical Training ◽  
Transfer Of Knowledge ◽  
Significant Percentage ◽  
Real Application ◽  
Theory To Practice ◽  
Effective Transfer

Achieving the desired high quality of student education is a major goal and task of the higher medical schools. Training is a very factual process involving not only learning and material facilities, but also teaching staff and motivated students. The main objective in the preparation of healthcare students is the quality practical training that modern higher education has to provide. No less important is the student's opinion on the methods and tools used in their training. For this reason, the younger generation sets its requirements in its formation as a medical specialist. The modern lecturer must skillfully pass on knowledge so that a transfer of competences from theory to practice can be successfully accomplished. The purpose: Establish the students' opinion on the quality of the learning process, allowing an effective transfer of competences from theory to practice. Materials and Methods: The analyzes in this report are from an anonymous questionnaire conducted among 145 students from the Thracian University from the professional field "Health Care" - first, second and third courses specialty "Rehabilitator therapist", "Medical Laboratory assistant", "Geriatric Care" and " Nursing "during the summer semester of the school year 2017/18. MSExcel and StatGrafics were used to process the data. Results and Discussion: To achieve effective training, it is imperative for lectures to maintain a high level of competence and constantly get acquainted with developments in medical science. Students highly appreciate as the most important qualities of the teacher's ability to maintain the interest of students "; "Attitude towards students" and its "competence". A significant percentage of those surveyed believe that the theory, in theory, finds real application in practice. A significant percentage of those surveyed believe that the theory, to practice, finds real application in practice. The transfer of knowledge from theory to practice is a two-way information process between lecturers and students of scientific knowledge and practical skills. Finally, we can point out that the transfer of competence from theory to practice is a process influenced by a number of factors such as: the professional competencies of the academic lecturer and the clinical tutor; better collaboration between the higher medical school and the clinical base; organization of training. Maintaining the interest of the students in acquiring the medical profession is an important prerequisite for their subsequent successful realization.

Combined ohmic and plate heating of hamburger patties: quality of cooked patties

2004 ◽  
Vol 63 (2) ◽  
pp. 141-145 ◽  
Author(s):  
Necati Özkan ◽  
Ian Ho ◽  
Mohammed Farid
Keyword(s):  
Plate Heating

Electric-field regulated crystallization process for enhanced performance of perovskite solar cells

2022 ◽  
Author(s):  
Chang Bao Han ◽  
Man Qi Wang ◽  
Xiaobo Zhang ◽  
Shaoxin Yan ◽  
NABONSWENDE AIDA NADEGE OUEDRAOGO ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electric Field ◽  
Crystallization Process ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Fabrication Cost ◽  
Perovskite Materials ◽  
The Poor ◽  
Rising Power

Perovskite solar cells (PSCs) have received tremendous attention because of their advantages of low fabrication cost and rising power conversion efficiency (PCE). However, the poor crystalline quality of perovskite materials...

Immunoferritin localization of intracellular antigens in positively stained frozen sections

1978 ◽  
Vol 36 (2) ◽  
pp. 168-169
Author(s):  
K. T. Tokuyasu
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Thin Layers ◽  
The Other ◽  
Positive Staining ◽  
Frozen Sections ◽  
The Past ◽  
Ultrathin Frozen Sections ◽  
Definition Of

During the past investigations of immunoferritin localization of intracellular antigens in ultrathin frozen sections, we found that the degree of negative staining required to delineate u1trastructural details was often too dense for the recognition of ferritin particles. The quality of positive staining of ultrathin frozen sections, on the other hand, has generally been far inferior to that attainable in conventional plastic embedded sections, particularly in the definition of membranes. As we discussed before, a main cause of this difficulty seemed to be the vulnerability of frozen sections to the damaging effects of air-water surface tension at the time of drying of the sections.Indeed, we found that the quality of positive staining is greatly improved when positively stained frozen sections are protected against the effects of surface tension by embedding them in thin layers of mechanically stable materials at the time of drying (unpublished).

Lithography below 100 nm

1983 ◽  
Vol 41 ◽  
pp. 96-99
Author(s):  
L. D. Jackel
Keyword(s):  
Spatial Distribution ◽  
Electron Beam ◽  
Electron Scattering ◽  
Electron Beam Lithography ◽  
Substrate Material ◽  
Local Electron ◽  
Electron Dose ◽  
Positive Resist ◽  
Exposure Process

Most production electron beam lithography systems can pattern minimum features a few tenths of a micron across. Linewidth in these systems is usually limited by the quality of the exposing beam and by electron scattering in the resist and substrate. By using a smaller spot along with exposure techniques that minimize scattering and its effects, laboratory e-beam lithography systems can now make features hundredths of a micron wide on standard substrate material. This talk will outline sane of these high- resolution e-beam lithography techniques.We first consider parameters of the exposure process that limit resolution in organic resists. For concreteness suppose that we have a “positive” resist in which exposing electrons break bonds in the resist molecules thus increasing the exposed resist's solubility in a developer. Ihe attainable resolution is obviously limited by the overall width of the exposing beam, but the spatial distribution of the beam intensity, the beam “profile” , also contributes to the resolution. Depending on the local electron dose, more or less resist bonds are broken resulting in slower or faster dissolution in the developer.

Convergent Beam Electron Diffraction

1978 ◽  
Vol 36 (3) ◽  
pp. 304-315
Author(s):  
G. Lehmpfuhl
Keyword(s):  
Electron Diffraction ◽  
Diffraction Pattern ◽  
Crystal Surface ◽  
Diffraction Spot ◽  
Crystal Thickness ◽  
Large Area ◽  
Electron Microscopic ◽  
Additional Information ◽  
Microscopic Investigations

Introduction In electron microscopic investigations of crystalline specimens the direct observation of the electron diffraction pattern gives additional information about the specimen. The quality of this information depends on the quality of the crystals or the crystal area contributing to the diffraction pattern. By selected area diffraction in a conventional electron microscope, specimen areas as small as 1 µ in diameter can be investigated. It is well known that crystal areas of that size which must be thin enough (in the order of 1000 Å) for electron microscopic investigations are normally somewhat distorted by bending, or they are not homogeneous. Furthermore, the crystal surface is not well defined over such a large area. These are facts which cause reduction of information in the diffraction pattern. The intensity of a diffraction spot, for example, depends on the crystal thickness. If the thickness is not uniform over the investigated area, one observes an averaged intensity, so that the intensity distribution in the diffraction pattern cannot be used for an analysis unless additional information is available.

Observability of Very Thick Specimen by Using Transmission Scanning Electron Microscope

1971 ◽  
Vol 29 ◽  
pp. 26-27
Author(s):  
K. Shibatomi ◽  
T. Yamanoto ◽  
H. Koike
Keyword(s):  
Electron Microscope ◽  
Image Quality ◽  
Scanning Electron Microscope ◽  
Chromatic Aberration ◽  
Image Contrast ◽  
Objective Lens ◽  
Thick Specimen ◽  
Transmission Electron ◽  
Scanning Electron

In the observation of a thick specimen by means of a transmission electron microscope, the intensity of electrons passing through the objective lens aperture is greatly reduced. So that the image is almost invisible. In addition to this fact, it have been reported that a chromatic aberration causes the deterioration of the image contrast rather than that of the resolution. The scanning electron microscope is, however, capable of electrically amplifying the signal of the decreasing intensity, and also free from a chromatic aberration so that the deterioration of the image contrast due to the aberration can be prevented. The electrical improvement of the image quality can be carried out by using the fascionating features of the SEM, that is, the amplification of a weak in-put signal forming the image and the descriminating action of the heigh level signal of the background. This paper reports some of the experimental results about the thickness dependence of the observability and quality of the image in the case of the transmission SEM.

The Current Situation in Chemical Stabilization of Biological Materials

1972 ◽  
Vol 30 ◽  
pp. 132-133
Author(s):  
John H. Luft
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Osmium Tetroxide ◽  
Molecular Level ◽  
Cross Linking ◽  
Chemical Stabilization ◽  
Specimen Preparation ◽  
Sufficient Condition ◽  
Radio Telescopes

With information processing devices such as radio telescopes, microscopes or hi-fi systems, the quality of the output often is limited by distortion or noise introduced at the input stage of the device. This analogy can be extended usefully to specimen preparation for the electron microscope; fixation, which initiates the processing sequence, is the single most important step and, unfortunately, is the least well understood. Although there is an abundance of fixation mixtures recommended in the light microscopy literature, osmium tetroxide and glutaraldehyde are favored for electron microscopy. These fixatives react vigorously with proteins at the molecular level. There is clear evidence for the cross-linking of proteins both by osmium tetroxide and glutaraldehyde and cross-linking may be a necessary if not sufficient condition to define fixatives as a class.

Resistance Monitor and Control for Vacuum Evaporation of Metals and Carbon

1976 ◽  
Vol 34 ◽  
pp. 572-573
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe ◽  
J. Michael Moseley
Keyword(s):  
Electronic Device ◽  
Point Sources ◽  
High Contrast ◽  
Variable Resistor ◽  
Quality Of Results ◽  
Low Contrast ◽  
Evaporation Source ◽  
And Control ◽  
At Will

We have designed and built an electronic device which compares the resistance of a defined area of vacuum evaporated material with a variable resistor. When the two resistances are matched, the device automatically disconnects the primary side of the substrate transformer and stops further evaporation.This approach to controlled evaporation in conjunction with the modified guns and evaporation source permits reliably reproducible multiple Pt shadow films from a single Pt wrapped carbon point source. The reproducibility from consecutive C point sources is also reliable. Furthermore, the device we have developed permits us to select a predetermined resistance so that low contrast high-resolution shadows, heavy high contrast shadows, or any grade in between can be selected at will. The reproducibility and quality of results are demonstrated in Figures 1-4 which represent evaporations at various settings of the variable resistor.

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