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Total result(s) found: 23
  • Reversible Band Gap Narrowing of Sn‐based Hybrid Perovskite Single Crystal with Excellent Phase Stability
    Dianxing Ju, Xiaopeng Zheng, Jialiang Liu, Yan Chen, Jian Zhang, Bingqiang Cao, Hang Xiao, Omar F. Mohammed, Osman M. Bakr, Xutang Tao
    Angew. Chem. 2018, 130, 1–6
Keywords:
Bandlückenverengung, Bleifreie, Perowskite, Optoelektronische Eigenschaften, Phasenstabilität
  • Surface Effect on 2D Hybrid Perovskite Crystals: Perovskites Using an Ethanolamine Organic Layer as an Example​
    Kang‐Ting Ho, Siu‐Fung Leung, Ting‐You Li, Partha Maity, Bin Cheng, Hui‐Chun Fu, Omar F. Mohammed, Jr‐Hau He
    Adv. Mater. 2018, 1804372​
Keywords:
2D materials, moisture stability, optoelectronics, perovskites, surface effect
  • Layer-Dependent Rashba Band Splitting in 2D Hybrid Perovskites
    Jun Yin, Partha Maity, Liangjin Xu, Ahmed M. El-Zohry, Hong Li, Osman M. Bakr, Jean-Luc Brédas, Omar F. Mohammed
    Chemistry of Materials
Keywords:
Layer-Dependent Rashba Band, 2D Hybrid Perovskites
  • Point Defects and Green Emission in Zero-Dimensional Perovskites​
    Jun Yin, Haoze Yang, Kepeng Song, Ahmed M. El-Zohry, Yu Han, Osman M. Bakr, Jean-Luc Brédas, Omar F. Mohammed​
    J. Phys. Chem. Lett., 2018, 9, pp 5490–5495​​
Keywords:
Point Defects, Green Emission
  • Halogen Migration in Hybrid Perovskites: The Organic Cation Matters​
    Aleksandra Oranskaia, Jun Yin, Osman M. Bakr, Jean-Luc Brédas, Omar F. Mohammed​
    J. Phys. Chem. Lett., 2018, 9, pp 5474–5480​
Keywords:
Halogen Migration, Organic Cation Matters
  • Giant Photoluminescence Enhancement in CsPbCl3 Perovskite Nanocrystals by Simultaneous Dual-Surface Passivation
    Ghada H. Ahmed, Jehad K. El-Demellawi, Jun Yin, Jun Pan, Dhinesh Babu Velusamy, Mohamed Nejib Hedhili, Erkki Alarousu, Osman M. Bakr, Husam N. Alshareef, Omar F. Mohammed
    ACS Energy Lett., 2018, 3, pp 2301–2307
Keywords:
CsPbCl3 Perovskite Nanocrystals, Simultaneous Dual-Surface Passivation
  • All-inorganic perovskite nanocrystal scintillators​​​​​
    Qiushui Chen, Jing Wu, Xiangyu Ou, Bolong Huang, Jawaher Almutlaq, Ayan A. Zhumekenov, Xinwei Guan, Sanyang Han, Liangliang Liang, Zhigao Yi, Juan Li, Xiaoji Xie, Yu Wang, Ying Li, Dianyuan Fan, Daniel B. L. Teh, Angelo H. All, Omar F. Mohammed, Osman M. Bakr, Tom Wu, Marco Bettinelli, Huanghao Yang, Wei Huang, Xiaogang Liu​
    Naturevolume 561, pages88–93 (2018)​​
Keywords:
Materials for devices, Nanoparticles, Quantum dots, X-rays
  • Tunable Multipolar Surface Plasmons in 2D Ti3C2Tx MXene Flakes
    J.K. El-Demellawi, S. Lopatin, J. Yin, O.F. Mohammed, H.N. Alshareef
    ACS Nano, Article ASAP​
Keywords:
in situ heating STEM; independent polarizability; low-loss/core-loss EELS; surface plasmon blue-shift; temperature-dependent STEM-EELS
  • Scanning ultrafast electron microscopy: Four-dimensional imaging of materials dynamics in space and time
    D.-S. Yang, B. Liao, O.F. Mohammed
    MRS Bulletin, Volume 43, Issue 7 (Ultrafast Imaging of Materials Dynamics), pp. 491-496
Keywords:
field emission, scanning electron microscopy (SEM) nanostructure, photovoltaic, optoelectronic
  • Intramolecular Energy and Electron Transfers in Bodipy-Naphthalenediimide Triads
    Mushraf Hussain, Ahmed M. El-Zohry, Habtom B. Gobeze, Jianzhang Zhao, Francis D'Souza, Omar F. Mohammed
    The Journal of Physical Chemistry A
Keywords:
Förster Resonance Energy Transfer
  • Efficient Photon Recycling and Radiation Trapping in Cesium Lead Halide Perovskite Waveguides
    Ibrahim Dursun, Yangzi Zheng, Tianle Guo, Michele De Bastiani, Bekir Turedi, Lutfan Sinatra, Md Azimul Haque, Bin Sun, Ayan A. Zhumekenov, Makhsud I. Saidaminov, F. Pelayo García de Arquer, Edward H. Sargent, Tom Wu, Yuri N. Gartstein, Osman M. Bakr, Omar F. Mohammed, Anton V. Malko
    ACS Energy Letters, 2018, 3, pp 1492–1498
Keywords:
Photon recycling, Perovskites
  • Imaging the Reduction of Electron Trap States in Shelled Copper Indium Gallium Selenide Nanocrystals Using Ultrafast Electron Microscopy
    Gabriele Meizyte, Riya Bose, Aniruddha Adhikari, Jun Yin, Md Azimul Haque, Manas R. Parida, Mohamed N. Hedhili, Tom Wu, Osman M. Bakr, Omar F. Mohammed
    The Journal of Physical Chemistry
Keywords:
CIGSe
  • The Benefit and Challenges of Zero-Dimensional Perovskites
    Jawaher M. Almutlaq, Jun Yin, Omar F. Mohammed, Osman M. Bakr
    The Journal of Physical Chemistry Letters​
Keywords:
Perovskite
  • Study of the Bulk Charge Carrier Dynamics in Anatase and Rutile TiO2 Single Crystals by Femtosecond Time Resolved Spectroscopy
    Partha Maity, Omar F. Mohammed, Khabiboulakh Katsiev, Hicham Idriss
    J. Phys. Chem. C, Article ASAP 
Keywords:
photocatalysis, renewable energy
  • Solvent-dependent dual fluorescence of the push–pull system 2-diethylamino-7-nitrofluorene
    M. A. B. Larsen, A. B. Stephansen, E. Alarousu, M. Pittelkow, O. F. Mohammed, T. I. Sølling
    Phys. Chem. Chem. Phys., 2018, 20, 5942-5951 
Keywords:
femtosecond transient absorption spectroscopy, apolar solvent cyclohexane, fluorescence
  • On the relationship between rutile/anatase ratio and the nature of defect states in sub-100 nm TiO2nanostructures: experimental insights
    Moamen M. Soliman, Mohamed H. Al Haron, Menna Samir, Sarah A. Tolba, Basamat S. Shaheen, Ahmed W. Amer, Omar F. Mohammed, Nageh K. Allam
    Phys. Chem. Chem. Phys., 2018, 20, 5975-5982​
Keywords:
TiO2, X-Ray Photoelectron Spectroscopy
  • Synthesis and Characterization of Branched fcc/hcp Ruthenium Nanostructures and Their Catalytic Activity in Ammonia Borane Hydrolysis
    Noktan M. Alyami, Alec P. LaGrow, Dalaver H. Anjum, Chao Guan, Xiaohe Miao, Lutfan Sinatra, Ding-Jier Yuan, Omar F.Mohammed, Kuo-Wei Huang, Osman M. Bakr
    Cryst. Growth Des., 2018, 18 (3), pp 1509–1516​
Keywords:
tungsten carbonyl, molybdenum carbonyl, rhenium carbonyl, ruthenium nanoparticles,
  • Water-Induced Dimensionality Reduction in Metal-Halide Perovskites
    Bekir Turedi, Kwangjae Lee, Ibrahim Dursun, Badriah Alamer, Zhennan Wu, Erkki Alarousu, Omar F. Mohammed, Namchul Cho, Osman M. Bakr
    The Journal of Physical Chemistry C
Keywords:
optoelectronic, photoluminescence. synthetic method, 2D perovskite
  • Tailoring the Crystal Structure of Nanoclusters Unveiled High Photoluminescence via Ion Pairing​
    Megalamane S. Bootharaju, Sergey M. Kozlov, Zhen Cao, Aleksander Shkurenko, Ahmed M. El-Zohry, Omar F. Mohammed, Mohamed, Eddaoudi, Osman M. Bakr, Luigi Cavallo, Jean-Marie Basset
    Chemistry of Materials
Keywords:
bimetallic, adamantanethiolate, benzenedithiolate, triphenylphosphine
  • Zeolite-like Metal-organic Framework (MOF) Encaged Pt(II)-porphyrin for Anion-selective Sensing
    Dilshad Masih, Valeriya Chernikova, Osama Shekhah, Mohamed Eddaoudi, Omar F. Mohammed
    J. Phys. Chem. C, 2018, 122 (11), pp 6493–6498
Keywords:
platinum-metallated porphyrin, biosensors
  • Ligand-Free Nanocrystals of Highly Emissive Cs4PbBr6 Perovskite​
    Yuhai Zhang, Lutfan Sinatra, Erkki Alarousu, Jun Yin, Ahmed M. El-Zohry, Osman M. Bakr, Omar F. Mohammed
    J. Phys. Chem. C, 2018, 122 (11), pp 6493–6498​​​​​
Keywords:
perovskite nanocrystals, diode, ligand-free perovskite, ammonium acetate, cesium chloride, nanocrystals, spectroscopy,
  • Imaging Localized Energy States in Silicon-doped InGaN Nanowires Using 4D Electron Microscopy
    R. Bose, A. Adhikari, V.M. Burlakov, G. Liu, M.A. Haque, D. Priante, M.N. Hedhili, N. Wehbe, C. Zhao, H. Yang, T.K. Ng, A. Goriely, O.M. Bakr, T. Wu, B.S. Ooi, O.F. Mohammed
    ACS Energy Letters, 2018
Keywords:
Ultrafast electron microscopy, Nanowires
  • Bidentate Ligand-Passivated CsPbI3 Perovskite Nanocrystals for Stable Near-Unity Photoluminescence Quantum Yield and Efficient Red Light-Emitting Diodes
    J. Pan, Y. Shang, J. Yin, M.D. Bastiani, W. Peng, I. Dursun, L. Sinatra, A.M. El-Zohry, M.N. Hedhili, A.-H. Emwas, O.F. Mohammed, Z. Ning, O.M. Bakr
    J. Am. Chem. Soc., 2018, 140 (2), pp 562–565​
Keywords:
Perovskite, Nanocrystals, Optoelectronics, LED