Search results for: Chang-Yong Nam

Items from 1 to 18 out of 18 results

article

Multielectrode electrochemical cell for in situ structural characterization of amorphous thin‐film catalysts using high‐energy X‐ray scattering

Gihan Kwon, Kim Kisslinger, Sooyeon Hwang, Gwen Wright, more

Journal of Applied Crystallography > 56 > 5 > 1392 - 1402

A multielectrode‐based electrochemical cell allows the structural characterization of an amorphous thin‐film water oxidation catalyst under various electrochemical potentials using high‐energy X‐ray scattering and atomic pair distribution function (PDF) techniques. A multielectrode with five electrodes provides a sufficiently low background signal to enable high‐energy X‐ray scattering (HEXS) measurements...

article

Palladium‐Percolated Networks Enabled by Low Loadings of Branched Nanorods for Enhanced H₂ Separations

Leiqing Hu, Kaiwen Chen, Won‐Il Lee, Kim Kisslinger, more

Advanced Materials > 35 > 26 > n/a - n/a

Nanoparticles (NPs) at high loadings are often used in mixed matrix membranes (MMMs) to improve gas separation properties, but they can lead to defects and poor processability that impede membrane fabrication. Herein, it is demonstrated that branched nanorods (NRs) with controlled aspect ratios can significantly reduce the required loading to achieve superior gas separation properties while maintaining...

article

Enhancing Crystallization in Hybrid Perovskite Solar Cells Using Thermally Conductive 2D Boron Nitride Nanosheet Additive

Yifan Yin, Yuchen Zhou, Shi Fu, Xianghao Zuo, more

Small > 19 > 15 > n/a - n/a

Controlling crystallization and grain growth is crucial for realizing highly efficient hybrid perovskite solar cells (PSCs). In this work, enhanced PSC photovoltaic performance and stability by accelerating perovskite crystallization and grain growth via 2D hexagonal boron nitride (hBN) nanosheet additives incorporated into the active perovskite layer are demonstrated. In situ X‐ray scattering and...

article

In Situ Growth of Crystalline and Polymer‐Incorporated Amorphous ZIFs in Polybenzimidazole Achieving Hierarchical Nanostructures for Carbon Capture

Leiqing Hu, Vinh T. Bui, Sankhajit Pal, Wenji Guo, more

Small > 18 > 23 > n/a - n/a

Mixed matrix materials (MMMs) hold great potential for membrane gas separations by merging nanofillers with unique nanostructures and polymers with excellent processability. In situ growth of the nanofillers is adapted to mitigate interfacial incompatibility to avoid the selectivity loss. Surprisingly, functional polymers have not been exploited to co‐grow the nanofillers for membrane applications...

article

The Role of Titania Surface Coating by Atomic Layer Deposition in Improving Osteogenic Differentiation and Hard Tissue Formation of Dental Pulp Stem Cells

Ya-Chen Chuang, Likun Wang, Kuan-Che Feng, Ashwanth Subramanian, more

Advanced Engineering Materials > 23 > 9 > n/a - n/a

Recent studies have focused on modifying implant surface properties to improve bone regeneration and osseointegration. Herein, the role of titania surface coating in enabling dental pulp stem cells (DPSCs) differentiation and hard tissue formation is studied. Atomic layer deposition is applied at lower temperature to coat a nanolayer of titania onto hard and soft polybutadiene substrates without...

article

Nanosecond laser scribing for see‐through CIGS thin film solar cells

Seungkuk Kuk, Zhen Wang, Hyeonggeun Yu, Chang‐Yong Nam, more

Progress in Photovoltaics: Research and Applications > 28 > 2 > 135 - 147

Building‐integrated photovoltaic (BIPV), especially in a semitransparent and/or see‐through configuration, has attracted significant attention because of the extended surfaces available for the photovoltaic (PV) installation including roofs, facades, and windows. In this study, we examine the P4 scribing process for fabricating see‐through cells on a new Cu (In,Ga)Se₂ (CIGS) architecture with indium...

article

ipso‐Arylative Ring‐Opening Polymerization as a Route to Electron‐Deficient Conjugated Polymers

Feng‐Yang Shih, Deokkyu Choi, Qin Wu, Chang‐Yong Nam, more

Angewandte Chemie International Edition > 58 > 1 > 288 - 291

ipso‐Arylative ring‐opening polymerization of 2‐bromo‐8‐aryl‐8H‐indeno[2,1‐b]thiophen‐8‐ol monomers proceeds to M_n up to 9 kg mol⁻¹ with conversion of the monomer diarylcarbinol groups to pendent conjugated aroylphenyl side chains (2‐benzoylphenyl or 2‐(4‐hexylbenzoyl)phenyl), which influence the optical and electronic properties of the resulting polythiophenes. Poly(3‐(2‐(4‐hexylbenzoyl)phenyl)thiophene)...

article

ipso‐Arylative Ring‐Opening Polymerization as a Route to Electron‐Deficient Conjugated Polymers

Feng‐Yang Shih, Deokkyu Choi, Qin Wu, Chang‐Yong Nam, more

Angewandte Chemie > 131 > 1 > 294 - 297

article

Review of Recent Advances in Applications of Vapor-Phase Material Infiltration Based on Atomic Layer Deposition

Ashwanth Subramanian, Nikhil Tiwale, Chang-Yong Nam

JOM > 2019 > 71 > 1 > 185-196

Polymer–inorganic hybrid nanocomposites exhibit enhanced material properties, combining the advantages of both their organic and inorganic subcomponents. Extensive research is being carried out to functionalize polymers towards various improved physicochemical characteristics such as electrical, optical, and mechanical properties for various applications. Vapor-phase material infiltration is an emerging...

article

Distinct Optoelectronic Signatures for Charge Transfer and Energy Transfer in Quantum Dot–MoS₂ Hybrid Photodetectors Revealed by Photocurrent Imaging Microscopy

Mingxing Li, Jia‐Shiang Chen, Prahlad K. Routh, Percy Zahl, more

Advanced Functional Materials > 28 > 29 > n/a - n/a

Atomically thin transition metal dichalcogenides (TMDCs) have intriguing nanoscale properties like high charge mobility, photosensitivity, layer‐thickness‐dependent bandgap, and mechanical flexibility, which are all appealing for the development of next generation optoelectronic, catalytic, and sensory devices. Their atomically thin thickness, however, renders TMDCs poor absorptivity. Here, bilayer...

article

Hybrid Photodetectors: Distinct Optoelectronic Signatures for Charge Transfer and Energy Transfer in Quantum Dot–MoS₂ Hybrid Photodetectors Revealed by Photocurrent Imaging Microscopy (Adv. Funct. Mater. 29/2018)

Mingxing Li, Jia‐Shiang Chen, Prahlad K. Routh, Percy Zahl, more

Advanced Functional Materials > 28 > 29 > n/a - n/a

Combining bilayer MoS₂ with different types of quantum dots yields hybrids that exhibit increased light harvesting, interfacial charge transfer and nonradiative energy transfer. Scanning photocurrent microscopy, applied by Chang‐Yong Nam, Mircea Cotlet and co‐workers in article number 1707558, reveals fast response in CdSe‐MoS₂ hybrids, ideal for photodetector applications. While CdSe‐ZnS‐MoS₂ hybrids...

article

Polymerization of Tellurophene Derivatives by Microwave‐Assisted Palladium‐Catalyzed ipso‐Arylative Polymerization

Young S. Park, Qin Wu, Chang‐Yong Nam, Robert B. Grubbs

Angewandte Chemie > 126 > 40 > 10867 - 10871

We report the synthesis of a tellurophene‐containing low‐bandgap polymer, PDPPTe2T, by microwave‐assisted palladium‐catalyzed ipso‐arylative polymerization of 2,5‐bis[(α‐hydroxy‐α,α‐diphenyl)methyl]tellurophene with a diketopyrrolopyrrole (DPP) monomer. Compared with the corresponding thiophene analog, PDPPTe2T absorbs light of longer wavelengths and has a smaller bandgap. Bulk heterojunction solar...

article

Polymerization of Tellurophene Derivatives by Microwave‐Assisted Palladium‐Catalyzed ipso‐Arylative Polymerization

Young S. Park, Qin Wu, Chang‐Yong Nam, Robert B. Grubbs

Angewandte Chemie International Edition > 53 > 40 > 10691 - 10695

chapter

Low-power organic electronics based on gate-tunable injection barrier in vertical graphene-organic semiconductor heterostructures

Htay Hlaing, Fabio Carta, Robert Barton, Chang-Yong Nam, more

72nd Device Research Conference > 279 - 280

2014 72nd Annual Device Research Conference (DRC)

Novel device architectures based on heterostructures of graphene with semiconductor layers have recently attracted considerable interest due to their potential in a wide range of electronic and photonic applications. The key concept in these devices is to exploit the work function tunability of graphene via external gate field to modulate the current flow across the graphene-semiconductor junction...

article

TiO2 nanofiber solid-state dye sensitized solar cells with thin TiO2 hole blocking layer prepared by atomic layer deposition

Jinwei Li, Xi Chen, Weihe Xu, Chang-Yong Nam, more

Thin Solid Films > 2013 > 536 > Complete > 275-279

We incorporated a thin but structurally dense TiO₂ layer prepared by atomic layer deposition (ALD) as an efficient hole blocking layer in the TiO₂ nanofiber based solid-state dye sensitized solar cell (ss-DSSC). The nanofiber ss-DSSCs having ALD TiO₂ layers displayed increased open circuit voltage, short circuit current density, and power conversion efficiency compared to control devices with blocking...

chapter

Examining nanoscale photovoltaics with high brightness Fourier transform measurements

Matthew Y. Sfeir, Fernando E. Camino, Chang-Yong Nam, Charles T. Black

CLEO: 2013 > 1 - 2

2013 Conference on Lasers and Electro-Optics (CLEO)

We describe a new Facility effort utilizing high brightness Fourier transform methods, including measurements of transmission, reflection, and photoconductivity spectra, to characterize nanomaterial-based model photovoltaic devices.

article

Phthalocyanine Blends Improve Bulk Heterojunction Solar Cells

Alessandro Varotto, Chang-Yong Nam, Ivana Radivojevic, Joao P. C. Tomé, more

Journal of the American Chemical Society > 2010 > 132 > 8 > 2552 - 2554

article

Diameter-Dependent Electromechanical Properties of GaN Nanowires

Chang-Yong Nam, Papot Jaroenapibal, Douglas Tham, David E. Luzzi, more

Nano Letters > 2006 > 6 > 2 > 153 - 158

Filter options

Publication date

Last 3 years (4)

Close

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.

From:

To:
Set your own date range

Publication type

article (16)
book (2)

Keywords

ATOMIC LAYER DEPOSITION (2)
CARBON CAPTURE (2)
CHARGE TRANSFER (2)
COLLOIDAL QUANTUM DOTS (2)
ENERGY TRANSFER (2)
PALLADIUM (2)
PHOTOCURRENT IMAGING (2)
TMDCS (2)
2D MATERIALS (1)
ADDITIVES (1)
AMORPHOUS ZIFS (1)
BORON NITRIDE (1)
CIGS THIN FILM SOLAR CELL (1)
CONDUCTING MATERIALS (1)
CROSS-COUPLING (1)
DENTAL PULP STEM CELLS (1)
ELECTROCHEMISTRY (1)
FOURIER TRANSFORMS (1)
GRAZING‐INCIDENCE WIDE‐ANGLE X‐RAY SCATTERING (GIWAXS) (1)
H 2/CO 2 SEPARATION (1)
H2 PURIFICATION (1)
HIGH‐ENERGY X‐RAY SCATTERING (1)
HYBRID PEROVSKITE SOLAR CELLS (1)
IN SITU STUDIES (1)
IPSO-ARYLATIVE POLYMERIZATION (1)
IPSO-ARYLIERUNGEN (1)
IPSO‐ARYLATIVE POLYMERIZATION (1)
IPSO‐ARYLIERENDE POLYMERISATION (1)
KREUZKUPPLUNGEN (1)
LASER SCRIBING (1)
LEITFÄHIGE MATERIALIEN (1)
LOW‐BANDGAP POLYMERS (1)
METALS (1)
MICROWAVE‐ASSISTED REACTIONS (1)
MIKROWELLENUNTERSTÜTZTE REAKTIONEN (1)
MIXED MATRIX MATERIALS (1)
MIXED MATRIX MEMBRANES (1)
MULTIELECTRODE CELLS (1)
NANOFIBERS (1)
NANOSECOND LASER (1)
OPERANDO STUDIES (1)
OPTICAL DEVICE FABRICATION (1)
OPTICAL SURFACE WAVES (1)
OPTICAL VARIABLES MEASUREMENT (1)
ORGANIC SOLAR CELLS (1)
ORGANISCHE SOLARZELLEN (1)
OSTEOGENESIS (1)
OXYGEN EVOLUTION CATALYSTS (1)
PAIR DISTRIBUTION FUNCTION (1)
PD NANORODS (1)
PERCOLATED NETWORKS (1)
PHOTOCONDUCTIVITY (1)
PLASMONS (1)
POLYBENZIMIDAZOLE (1)
POLYMERE MIT KLEINER BANDLÜCKE (1)
RING-OPENING POLYMERIZATION (1)
RINGÖFFNUNGSPOLYMERISATION (1)
SEE‐THROUGH SOLAR CELL (1)
SOLID-STATE DYE SENSITIZED SOLAR CELLS (1)
TELLUROPHEN (1)
TELLUROPHENE (1)
THIN FILMS (1)
TITANIA (1)
TITANIUM DIOXIDE (1)
TYPE I COLLAGEN (1)
more

Data set

Wiley (12)
ACS (2)
ieee (2)
Elsevier (1)
Springer (1)

Journal

Advanced Functional Materials (2)
Angewandte Chemie (2)
Angewandte Chemie International Edition (2)
Small (2)
Advanced Engineering Materials (1)
Advanced Materials (1)
JOM (1)
Journal of Applied Crystallography (1)
Journal of the American Chemical Society (1)
Nano Letters (1)
Progress in Photovoltaics: Research and Applications (1)
Thin Solid Films (1)
more

INFONA - science communication portal

Search results for: Chang-Yong Nam

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