Search results for: Ho Jun Song

Items from 1 to 20 out of 84 results

article

Calcium phosphate compound formed on electrospun chitosan nanofibers using modified simulated body fluid

Kyung Hee Park, Seok-Jae Kim, Yeong-Joon Park, Ho-Jun Song

Polymer Bulletin > 2019 > 76 > 8 > 4205-4214

In the present work, chitosan (CS) nanofibers were mineralized in order to enhance their osteoconductivity and the calcium phosphate (CaP) compounds formed on the surface were characterized. CS nanofibers blended with CS and polyvinyl alcohol were fabricated using an electrospinning technique. These fibers were soaked in a modified simulated body fluid (m-SBF) to encourage the formation of CaP for...

article

Enhancement of conductivity and transparency for of poly(3,4-ethylenedioxythiophene) films using photo-acid generator as dopant

Se Jin Kwon, Woong Cheol Seok, Jong Tae Leem, Ju Hui Kang, more

Polymer > 2018 > 147 > C > 30-37

We introduced the photoacid generator as dopant of photon energy to improve the conductivity of PEDOT:PSS films and form patterned film. The PEDOT:PSS film using PAG-001 exhibited the lowest sheet resistance of 156 Ω/sq at the photon energy of 1 J (10 wt% of PAG-001 in IPA). Also, the PEDOT:PSS film using PAG-301s exhibited the lowest sheet resistance of 154 Ω/sq at the photon energy of 1 J (10 wt%...

article

Effects of Organic Acids and a Fluoropolymer on the Conductivity and Transparency of Poly(3,4-ethylenedioxythiophene) Films

Se Jin Kwon, Ju Hui Kang, Seok Jo Kim, Won-Gun Koh, more

Macromolecular Research > 2018 > 26 > 5 > 410-417

Using two organic acids with similar structures, we could fabricate poly (3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS)-based conductive thin films with improved transparency and surface resistance. Sulfosuccinic acid showed better performance than p-toluenesulfonic acid with respect to the surface resistance and transparency, because sulfosuccinic acid has more acid group than...

article

Characterization and colorization of microarc-oxidized layers of binary titanium alloys

Moon-Jin Hwang, Hae-Rim Choi, Ho-Jun Song, Yeong-Joon Park

Journal of Alloys and Compounds > 2018 > 732 > C > 95-106

This study aimed to confer esthetic appearance on ash gray-colored titanium-based implant materials. Binary Ti alloys were prepared by arc-melting of titanium and one of the transition metals (Au, Cr, Cu, Mn, Mo, Nb, V, and Zr). Ti alloys containing 1, 2.5, 5 and 10 wt% alloying elements were microarc-oxidized in an electrolyte containing Ca and P ions under a constant current using a DC power supply...

article

Pulse electrodeposition of hydroxyapatite/chitosan coatings on titanium substrate for dental implant

Kyung Hee Park, Seok-Jae Kim, Moon-Jin Hwang, Ho-Jun Song, more

Colloid and Polymer Science > 2017 > 295 > 10 > 1843-1849

In this work, calcium phosphate/chitosan coatings were produced by the pulse electrodeposition method with variation of the deposition cycle and contents of chitosan solution. To investigate the morphology of the crystals and the electrochemical properties of hydroxyapatite/chitosan coating, a uniform hydroxyapatite coating was applied on the Ti-6Al-4 V substrate using the pulse voltage electrodeposition...

article

Characterization of a submandibular gland sialolith: micromorphology, crystalline structure, and chemical compositions

Yeong-Gwan Im, Min-Suk Kook, Byung-Gook Kim, Jae-Hyung Kim, more

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology > 2017 > 124 > 1 > e13-e20

The aim of this study was to understand the mechanism of mineralization and growth of a sialolith by analyzing its micromorphology, crystalline structure, and chemical compositions.A sialolith was removed along with submandibular salivary gland from a patient. After cross-cutting and polishing the sialolith, its morphology, chemical compositions, crystalline structure, and chemical states were analyzed...

article

Preparation and formation mechanism of porous carbon cryogel

Hyeonuk Yeo, Jin Jung, Ho Jun Song, Yong-Mun Choi, more

Microporous and Mesoporous Materials > 2017 > 245 > C > 138-146

A facile fabrication of a porous carbon cryogel from a blend (PAEO) of fluorinated poly(amic acid) and poly(ethylene oxide) (PEO) is demonstrated. The porous carbons are prepared by carbonizing the freeze-dried cyrogels of polymer blend with various contents. The original channel structures of the cryogels with PEO content below 5 wt% are perfectly maintained in the carbon cryogels. In particular,...

article

Development of Organic Semiconductors Based on Quinacridone Derivatives for Organic Field-Effect Transistors: High-Voltage Logic Circuit Applications

Yong Jin Jeong, Jongwook Jeon, Sangkug Lee, Myounggon Kang, more

IEEE Journal of the Electron Devices Society > 2017 > 5 > 3 > 209 - 213

Poly[quinacridone-alt-quaterthiophene] (PQCQT) was synthesized, using a Suzuki coupling reaction, to investigate the potential of quinacridone derivatives as organic semiconductors in organic fieldeffect transistors (OFETs) and circuits. A PQCQT film annealed at 150 °C yielded quite high field-effect performances, including a hole mobility of

$2.0 \times 10^{-2}$

cm²/(Vs). In addition, to confirm...

article

Hydrothermal fabrication and characterization of calcium phosphate anhydrous/chitosan composites

Kyung Hee Park, Seok-Jae Kim, Woon-Young Lee, Ho-Jun Song, more

Ceramics International > 2017 > 43 > 2 > 2786-2790

Calcium phosphate-based biomaterials are of special interest in bone regeneration due to their biocompatibility and biodegradability; on the other hand, chitosan has novel properties such as antibacterial properties, biocompatibility, and biodegradability. In the present study, a new calcium phosphate (CaP)/chitosan (Chi) nanocomposite biomaterial has been introduced, which was prepared using in situ...

article

Effect of crosslink density on thermal conductivity of epoxy/carbon nanotube nanocomposites

Jae Hun Choi, Ho Jun Song, Jin Jung, Jin Won Yu, more

Journal of Applied Polymer Science > 134 > 4 > n/a - n/a

The effect of the polymeric crosslink density on the thermal conductivity of an epoxy nanocomposite was investigated by adding two different diamine‐functionalized multiwalled carbon nanotubes (diamine‐MWNTs) to the epoxy resin as co‐curing agents and conducting fillers. Tetramethylenediamine (TMDA)‐MWNTs resulted in an epoxy nanocomposite with a higher crosslink density than octamethylenediamine...

article

Effect of manganese on the microstructure, mechanical properties and corrosion behavior of titanium alloys

Ji-Woo Kim, Moon-Jin Hwang, Mi-Kyung Han, Yong-Geun Kim, more

Materials Chemistry and Physics > 2016 > 180 > C > 341-348

The phase/microstructure, mechanical properties and corrosion behavior of a series of binary TiMn alloys with 5, 10, 15 and 20 wt% Mn were investigated in order to understand the effects of Mn content on mechanical properties, oxidation behavior, and electrochemical corrosion properties of TiMn alloys. The phase/microstructure of Ti-xMn alloys was analyzed using X-ray diffractometry, scanning electron...

article

Potentiating activity of luteolin on membrane permeabilizing agent and ATPase inhibitor against methicillin-resistant Staphylococcus aureus

Dae-Ki Joung, Young-Seob Lee, Sin-Hee Han, Sang-Won Lee, more

Asian Pacific Journal of Tropical Medicine > 2016 > 9 > 1 > 19-22

To investigate the mechanism of antibacterial activity of luteolin (LUT) against methicillin-resistant Staphylococcus aureus (MRSA).The mechanism of anti-MRSA activity of LUT was analyzed by the viability assay in membrane permeabilizing agent, ATPase inhibitors, and peptidoglycan (PGN) derived from Staphylococcus aureus (S. aureus). Also, transmission electron microscopy was used to monitor survival...

article

Low band gap polymer consisting of quinacridone and diketopyrrolopyrrole and isoindigo units: correlation of ordered structure and intramolecular charge transfer properties

Doo Hun Kim, Ho Jun Song, Eui Jin Lee, Eui Jin Ko, more

Synthetic Metals > 2015 > 210 > Part B > 304-313

Demand for low band gap polymer materials is driven by the fast growing organic photovoltaic industry. In the present study, to develop highly functional conjugated polymers, poly[quinacridone-diketopyrrolopyrrole] (PQCDPP) and poly[quinacridone-isoindigo] (PQCDIG) were synthesized via the Suzuki coupling reaction. While these two polymers provided high absorption in the region of over 700nm, PQCIDG...

article

Characterizations of Ca- and Mg-incorporating micro/nano-structured surfaces on titanium fabricated by microarc oxidation and hydrothermal treatments

Sang-Hoon Ko, Moon-Jin Hwang, Won-Jin Moon, Yeong-Joon Park, more

Journal of Physics and Chemistry of Solids > 2015 > 87 > C > 147-152

The micro/nano-surface characteristics of magnesium- and calcium-incorporating titanium oxide layers fabricated on titanium metal using microarc oxidation (MAO) and hydrothermal (HT) treatments were investigated. Calcium acetate monohydrate (CA), magnesium acetate monohydrate (MA), and β-glycerophosphoric acid disodium salt pentahydrate were used as electrolytes for MAO treatment of titanium disks...

article

Solution-processed interlayer of n-type small molecules for organic photovoltaic devices: Enhancement of the fill factor due to ordered orientation

Ho Jun Song, Eui Jin Lee, Doo Hun Kim, Doo Kyung Moon, more

Solar Energy Materials and Solar Cells > 2015 > 141 > C > 232-239

Novel alcohol/water-soluble small molecules were obtained using various p- and n-type backbones. The synthesized molecules were dissolved in organic solvents and highly polar solvents. The DPPA film exhibited strong shoulder peak at approximately 633nm compared with the solution, which was due to the ordered orientation of DPPA. According to XRD measurements, a prominent diffraction peak at 20.1°...

article

Characterization of passive layers formed on Ti–10wt% (Ag, Au, Pd, or Pt) binary alloys and their effects on galvanic corrosion

Moon-Jin Hwang, Eun-Jin Park, Won-Jin Moon, Ho-Jun Song, more

Corrosion Science > 2015 > 96 > C > 152-159

Ti binary alloys containing 10wt% noble metal elements of Ag, Au, Pd, or Pt were prepared to obtain the different phase structures. The metallurgical phase structures and corrosion behavior of Ti alloys were investigated. From the ac impedance data analysis, the passivation model on Ti alloys was established and electrochemical parameters of stratified layers were obtained. The stratified layers successively...

article

Solution-processed interlayer of discotic-based small molecules for organic photovoltaic devices: Enhancement of both the open-circuit voltage and the fill factor

Ho Jun Song, Eui Jin Lee, Doo Hun Kim, Tae Ho Lee, more

Dyes and Pigments > 2015 > 113 > Complete > 210-218

A novel alcohol/water-soluble, discotic type derivative of pyrene was obtained using a simple synthesis process. The pyrene derivative was dissolved in organic solvents and highly polar solvents. The absorption spectrum of the pyrene derivative in a thin film was almost identical with that observed in solution compared with a fluorene derived co-polymer, the extensive planarity of the pyrene unit...

article

Effect of zirconium content on the microstructure, physical properties and corrosion behavior of Ti alloys

Mi-Kyung Han, Moon-Jin Hwang, Min-Soo Yang, Hong-So Yang, more

Materials Science & Engineering A > 2014 > 616 > Complete > 268-274

A series of Ti–xZr alloys with Zr contents ranging from 5 to 20wt% was prepared and the effects of Zr addition on the microstructure, physical properties, and corrosion behavior of Ti alloys were investigated. The phase and microstructures were characterized using X-ray diffractometry (XRD), optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The Ti–xZr...

article

Eutectoid nanostructure formation in Ti–xPd alloys and its effects on mechanical properties and cytotoxicity

Jeong-Hee Cho, Moon-Jin Hwang, Mi-Kyung Han, Ok-Sung Han, more

Journal of Alloys and Compounds > 2014 > 610 > Complete > 74-81

A series of Ti–xPd alloys with Pd contents ranging from 5 to 20wt% were prepared in this study and the effects of Pd addition on microstructure, mechanical properties, corrosion behavior and cytotoxicity of Ti alloys were investigated. XRD analysis, optical microscopy, SEM, and TEM results indicated that the phases/crystal structure of the binary Ti–xPd alloy was sensitive to its Pd content in the...

article

Cytotoxicity of alloying elements and experimental titanium alloys by WST-1 and agar overlay tests

Yo-Han Song, Min-Kang Kim, Eun-Jin Park, Ho-Jun Song, more

Dental Materials > 2014 > 30 > 9 > 977-983

This study was performed to evaluate the biocompatibility of nine types of pure metals using 36 experimental prosthetic titanium-based alloys containing 5, 10, 15, and 20wt% of each substituted metal.The cell viabilities for pure metals on Ti alloys that contain these elements were compared with that of commercially pure (CP) Ti using the WST-1 test and agar overlay test.The ranking of pure metal...

Publication date

Set your own date range

Publication type

article (83)
book (1)

Keywords

CONJUGATED POLYMER (10)
OPVS (8)
TITANIUM (6)
QUINOXALINE (5)
CORROSION (4)
EMF (4)
FLUORENE (4)
HYDROXYAPATITE (4)
MICROARC OXIDATION (4)
WPLED (4)
CHITOSAN (3)
CONJUGATED POLYMERS (3)
DEGREE OF DISSOCIATION (3)
HYDROTHERMAL TREATMENT (3)
MECHANICAL PROPERTIES (3)
PILOT PLANT (3)
QUINACRIDONE (3)
ABSORPTION (2)
ADSORPTION (2)
AGAR OVERLAY TEST (2)
ALKANOLAMINE (2)
ALTERNATIVE SCENARIO THROUGH LEAP (2)
ANODIC OXIDATION (2)
BIOACTIVITY (2)
CHEMICAL ABSORPTION (2)
CHEMICAL SOLUBILITY (2)
CO2 ABSORPTION (2)
COPOLYMERIZATION (2)
D. OPTICAL PROPERTIES (2)
DENTAL MATERIALS (2)
DISSOCIATION CONSTANT (2)
ELECTROCHEMICAL PROPERTIES (2)
ELECTROLYTE (2)
GIBBS FREE ENERGY (2)
IMPLANT (2)
INTERLAYER (2)
METAL HALIDES (2)
MICROSTRUCTURE (2)
MONOETHANOLAMINE (2)
NANOROD (2)
ORGANIC PHOTOVOLTAICS (2)
PLED (2)
RATE PROMOTER (2)
SELF-ORGANIZATION (2)
SIMULATED BODY FLUID (2)
SMALL MOLECULE (2)
SODIUM GLYCINATE (2)
THERMODYNAMIC TRANSFER (2)
TITANIUM ALLOY (2)
WST-1 TEST (2)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 78.20.-E (2)
CDAL 2 SE 4 SINGLE CRYSTALS (1)
TLGA 0 . 8 SB 0 . 2 S 2 (1)
1,4-DIOXANE (1)
A. ALLOY (1)
A. MICROPOROUS MATERIALS (1)
A. NANOSTRUCTURES (1)
A. THIN FILMS (1)
A. TITANIUM (1)
ABSORPTION COEFFICIENT (1)
ACTIVATED CARBON (1)
ACTIVITY COEFFICIENT (1)
ADHESION (1)
ALKOXY CHAIN (1)
ALLOY CYTOTOXICITY (1)
ALLOYS (1)
AMINO ACID SALT (1)
AMINO ACID SALTS (1)
ANATASE TITANIUM DIOXIDE (1)
ANNEALING (1)
ANODIZING (1)
ANTHRACENE (1)
AROMATIC HYDROCARBON (1)
ATPASE INHIBITOR (1)
B. CHEMICAL SYNTHESIS (1)
B. EIS (1)
B. POLARIZATION (1)
B. SEM (1)
BARKER’S METHOD (1)
BATIO3 (1)
BENZOTHIADIAZOLE (1)
BENZOTHIADIAZOLE DERIVATIVE (1)
BENZOTRIAZOLE (1)
BIOCOMPATIBILITY (1)
BIOT-SAVART LAW (1)
BLENDED ABSORBENT (1)
BOND STRENGTH (1)
BONE-LIKE APATITE (1)
BONE-LIKE MINERAL (1)
BOVINE SERUM ALBUMIN (1)
BULK-HETEROJUNCTION POLYMER SOLAR CELLS (1)
BUTYL ACETATE (1)
C. ELECTRON MICROSCOPY (1)
C. IMPURITY IN SEMICONDUCTORS (1)
C. PASSIVE FILMS (1)
CABON DIOXIDE (1)
CALCIUM PHOSPHATE (1)
CALCIUM TITANATE (1)
CARBON DIOXIDE (1)
CARBON DIOXIDE (CO2) (1)
more

Data set

Elsevier (58)
Springer (14)
ACS (7)
Wiley (3)
ieee (2)

Journal

Solar Energy Materials and Solar Cells (6)
Synthetic Metals (6)
Korean Journal of Chemical Engineering (4)
European Polymer Journal (3)
Fluid Phase Equilibria (3)
Industrial & Engineering Chemistry Research (3)
Journal of Chemical & Engineering Data (3)
Journal of Industrial and Engineering Chemistry (3)
Applied Surface Science (2)
Current Applied Physics (2)
Energy Policy (2)
Fuel (2)
Fuel Processing Technology (2)
Journal of Alloys and Compounds (2)
Journal of Dentistry (2)
Journal of Material Cycles and Waste Management (2)
Journal of Physics and Chemistry of Solids (2)
Materials Science & Engineering C (2)
Polymer (2)
Surface & Coatings Technology (2)
Asian Pacific Journal of Tropical Medicine (1)
Ceramics International (1)
Chemical Papers (1)
Colloid and Polymer Science (1)
Corrosion Science (1)
Dental Materials (1)
Dyes and Pigments (1)
Energy (1)
Energy & Fuels (1)
Gold Bulletin (1)
IEEE Journal of the Electron Devices Society (1)
International Journal of Greenhouse Gas Control (1)
Journal of Applied Polymer Science (1)
Journal of Chemical Technology & Biotechnology (1)
Journal of Materials Processing Tech. (1)
Journal of Materials Science: Materials in Medicine (1)
Journal of Solution Chemistry (1)
Macromolecular Materials and Engineering (1)
Macromolecular Research (1)
Materials Chemistry and Physics (1)
Materials Letters (1)
Materials Science & Engineering A (1)
Microporous and Mesoporous Materials (1)
Nanoscale Research Letters (1)
Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology (1)
Polymer Bulletin (1)
Solid State Communications (1)
The Journal of Chemical Thermodynamics (1)
more

INFONA - science communication portal

Search results for: Ho Jun Song

Calcium phosphate compound formed on electrospun chitosan nanofibers using modified simulated body fluid

Enhancement of conductivity and transparency for of poly(3,4-ethylenedioxythiophene) films using photo-acid generator as dopant

Effects of Organic Acids and a Fluoropolymer on the Conductivity and Transparency of Poly(3,4-ethylenedioxythiophene) Films

Characterization and colorization of microarc-oxidized layers of binary titanium alloys

Pulse electrodeposition of hydroxyapatite/chitosan coatings on titanium substrate for dental implant

Characterization of a submandibular gland sialolith: micromorphology, crystalline structure, and chemical compositions

Preparation and formation mechanism of porous carbon cryogel

Development of Organic Semiconductors Based on Quinacridone Derivatives for Organic Field-Effect Transistors: High-Voltage Logic Circuit Applications

Hydrothermal fabrication and characterization of calcium phosphate anhydrous/chitosan composites

Effect of crosslink density on thermal conductivity of epoxy/carbon nanotube nanocomposites

Effect of manganese on the microstructure, mechanical properties and corrosion behavior of titanium alloys

Potentiating activity of luteolin on membrane permeabilizing agent and ATPase inhibitor against methicillin-resistant Staphylococcus aureus

Low band gap polymer consisting of quinacridone and diketopyrrolopyrrole and isoindigo units: correlation of ordered structure and intramolecular charge transfer properties

Characterizations of Ca- and Mg-incorporating micro/nano-structured surfaces on titanium fabricated by microarc oxidation and hydrothermal treatments

Solution-processed interlayer of n-type small molecules for organic photovoltaic devices: Enhancement of the fill factor due to ordered orientation

Characterization of passive layers formed on Ti–10wt% (Ag, Au, Pd, or Pt) binary alloys and their effects on galvanic corrosion

Solution-processed interlayer of discotic-based small molecules for organic photovoltaic devices: Enhancement of both the open-circuit voltage and the fill factor

Effect of zirconium content on the microstructure, physical properties and corrosion behavior of Ti alloys

Eutectoid nanostructure formation in Ti–xPd alloys and its effects on mechanical properties and cytotoxicity

Cytotoxicity of alloying elements and experimental titanium alloys by WST-1 and agar overlay tests

Filter options

Publication date

Publication type

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Ho Jun Song

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options