Results 171 to 180 of about 3,792,456 (386)

Removing Homocoupling Defects in Alkoxy/Alkyl‐PBTTT Enhances Polymer:Fullerene Co‐Crystal Formation and Stability

open access: yesAdvanced Functional Materials, EarlyView.
PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu   +14 more
wiley   +1 more source

THE PROBLEMS OF LEARNING SPEAKING FACED BY THE FIRST \ud SEMESTER STUDENTS OF STTAD “LEMJIANTEK” MALANG [PDF]

open access: yes, 2007
In this study, the writer was interested in describing the problems of learning speaking faced by the first semester students of STTAD LEMJIANTEK. Descriptive qualitative research was used as design of this study. The research involved 60 students in the
Wahyu Hidayanti, Desy
core  

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

open access: yesAdvanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund   +6 more
wiley   +1 more source

THE PSYCHOLOGICAL PROBLEMS FACED BY STUDENTS OF SPEAKING CLASS ENGLISH DEPARTMENT UNIVERSITY OF MUHAMMADIYAH MALANG [PDF]

open access: yes, 2009
From four skills which are learned such as listening, speaking, reading and writing, the most important skill is speaking. Some students have psychological problems in communication.
Wicaksono, Astra
core  

Facile Synthesis of CuxS Electrocatalysts for CO2 Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

open access: yesAdvanced Functional Materials, EarlyView.
Copper sulfide based electrocatalysts for CO2 conversion are selective for production of formate as major product. Transformations under electrochemical conditions result in significant sulfur loss, and this study examines the nature of how persistent, residual sulfur (observed as surface SO42– species and S dissolved in the electrolyte) can sustain ...
Sasho Stojkovikj   +8 more
wiley   +1 more source

IMPROVING THE FOURTH GRADE STUDENTS’ SPEAKING SKILLS THROUGH BOARD GAMES AT SD MUHAMMADIYAH PEPE BANTUL YOGYAKARTA [PDF]

open access: yes, 2012
This study was aimed at improving the fourth grade students’ speaking skills through board games at SD Muhammadiyah Pepe, Bantul Yogyakarta. Based on the preliminary observation, there were some problems in the teaching and learning of speaking.
Ika Nur, Rahmawati
core  

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