Qihua Xiong

Summary

Affiliation: Nanyang Technological University
Country: Singapore

Publications

  1. doi request reprint Transparent free-standing metamaterials and their applications in surface-enhanced Raman scattering
    Xinglin Wen
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 6:132-9. 2014
  2. doi request reprint Layer-by-layer thinning of MoS₂ by thermal annealing
    Xin Lu
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 5:8904-8. 2013
  3. doi request reprint Vertically aligned gold nanorod monolayer on arbitrary substrates: self-assembly and femtomolar detection of food contaminants
    Bo Peng
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    ACS Nano 7:5993-6000. 2013
  4. doi request reprint Surface depletion induced quantum confinement in CdS nanobelts
    Dehui Li
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    ACS Nano 6:5283-90. 2012
  5. doi request reprint Solution phase van der Waals epitaxy of ZnO wire arrays
    Yue Zhu
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 5:7242-9. 2013
  6. ncbi request reprint Composition-Tunable Vertically Aligned CdS(x) Se(1-x) Nanowire Arrays via van der Waals Epitaxy: Investigation of Optical Properties and Photocatalytic Behavior
    Jun Pan
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Adv Mater 24:4151-6. 2012
  7. doi request reprint Enhanced thermoelectric properties of solution grown Bi2Te(3-x)Se(x) nanoplatelet composites
    Ajay Soni
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 12:1203-9. 2012
  8. doi request reprint Highly enhanced exciton recombination rate by strong electron-phonon coupling in single ZnTe nanobelt
    Qing Zhang
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 12:6420-7. 2012
  9. doi request reprint Electric-field-dependent photoconductivity in CdS nanowires and nanobelts: exciton ionization, Franz-Keldysh, and Stark effects
    Dehui Li
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 12:2993-9. 2012
  10. ncbi request reprint Synthesis and optical properties of II-VI 1D nanostructures
    Muhammad Iqbal Bakti Utama
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 4:1422-35. 2012

Collaborators

Detail Information

Publications34

  1. doi request reprint Transparent free-standing metamaterials and their applications in surface-enhanced Raman scattering
    Xinglin Wen
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 6:132-9. 2014
    ....
  2. doi request reprint Layer-by-layer thinning of MoS₂ by thermal annealing
    Xin Lu
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 5:8904-8. 2013
    ..Eventually, monolayer MoS₂ is achieved. We have characterized the process by optical contrast, Raman spectroscopy and atomic force microscopy (AFM), and observed a mixture of surfaces of N and N- 1 layers...
  3. doi request reprint Vertically aligned gold nanorod monolayer on arbitrary substrates: self-assembly and femtomolar detection of food contaminants
    Bo Peng
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    ACS Nano 7:5993-6000. 2013
    ..The highly organized vertical arrays generate the reproducible "SERS-active sites" and can be achieved on arbitrary substrates, ranging from silicon, gallium nitride, glass to flexible poly(ethylene naphthalate) substrates. ..
  4. doi request reprint Surface depletion induced quantum confinement in CdS nanobelts
    Dehui Li
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    ACS Nano 6:5283-90. 2012
    ..No shift is found at 10 K both with or without PMMA passivation, suggesting a much weaker depletion field due to the freezing-out of donors...
  5. doi request reprint Solution phase van der Waals epitaxy of ZnO wire arrays
    Yue Zhu
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 5:7242-9. 2013
    ..We expect our seedless and catalyst-free solution phase van der Waals epitaxy synthesis to be widely applicable in other materials and structures. ..
  6. ncbi request reprint Composition-Tunable Vertically Aligned CdS(x) Se(1-x) Nanowire Arrays via van der Waals Epitaxy: Investigation of Optical Properties and Photocatalytic Behavior
    Jun Pan
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Adv Mater 24:4151-6. 2012
    ..The results of our characterizations show that our facile growth method enables accurate composition adjustability for the modulation of the crystalline, optical, and photocatalytic properties of the alloy nanowire arrays...
  7. doi request reprint Enhanced thermoelectric properties of solution grown Bi2Te(3-x)Se(x) nanoplatelet composites
    Ajay Soni
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 12:1203-9. 2012
    ..Tentatively, such an enhancement of the thermoelectric performance in nanoplatelet composites is attributed to the energy filtering of low energy electrons by abundant grain boundaries in aligned nanocomposites...
  8. doi request reprint Highly enhanced exciton recombination rate by strong electron-phonon coupling in single ZnTe nanobelt
    Qing Zhang
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 12:6420-7. 2012
    ..Finally we prove that under high excitation power amplified spontaneous emission (ASE) originating from the electron-hole plasma occurs, thereby opening another radiative decay channel with an ultrashort lifetime of few picoseconds...
  9. doi request reprint Electric-field-dependent photoconductivity in CdS nanowires and nanobelts: exciton ionization, Franz-Keldysh, and Stark effects
    Dehui Li
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 12:2993-9. 2012
    ....
  10. ncbi request reprint Synthesis and optical properties of II-VI 1D nanostructures
    Muhammad Iqbal Bakti Utama
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 4:1422-35. 2012
    ..With the steady development of their synthesis, characterization and device fabrication, it is strongly expected that II-VI 1D nanostructures will assume a unique position in future technology...
  11. ncbi request reprint Flexible visible-infrared metamaterials and their applications in highly sensitive chemical and biological sensing
    Xinlong Xu
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 11:3232-8. 2011
    ....
  12. ncbi request reprint Wavelength tunable single nanowire lasers based on surface plasmon polariton enhanced Burstein-Moss effect
    Xinfeng Liu
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 13:5336-43. 2013
    ..Measurements of enhanced exciton emission intensities and recombination rates in the presence of Au film further support the strong interaction between SPP and excitons, which is consistent with the simulation results...
  13. doi request reprint Metamaterials-based label-free nanosensor for conformation and affinity biosensing
    Cuong Cao
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    ACS Nano 7:7583-91. 2013
    ..We further demonstrate the use of the metamaterials for fingerprinting and detection of the arginine-glycine-glycine domain of nucleolin, a cancer biomarker that specifically binds to a G-quadruplex, with the picomolar sensitivity. ..
  14. ncbi request reprint Vertically aligned cadmium chalcogenide nanowire arrays on muscovite mica: a demonstration of epitaxial growth strategy
    Muhammad Iqbal Bakti Utama
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 11:3051-7. 2011
    ..3 meV) was identified, suggesting the high quality of the nanowires. This study demonstrated the generality of van der Waals epitaxy for the growth of nanowire arrays and their potential applications in optical and energy related devices...
  15. doi request reprint Recent developments and future directions in the growth of nanostructures by van der Waals epitaxy
    Muhammad Iqbal Bakti Utama
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 5:3570-88. 2013
    ..With our works, we aim to advocate vdWE as a prospective universal growth strategy for nonplanar epitaxial nanostructures...
  16. ncbi request reprint Tailoring alphabetical metamaterials in optical frequency: plasmonic coupling, dispersion, and sensing
    Jun Zhang
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    ACS Nano 8:3796-806. 2014
    ..Our tunable alphabetical metamaterials provide a generic platform to study the electromagnetic properties of metamaterials and explore the novel applications in optical frequency. ..
  17. ncbi request reprint Quantum dots on vertically aligned gold nanorod monolayer: plasmon enhanced fluorescence
    Bo Peng
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nanoscale 6:5592-8. 2014
    ..By coupling with CdSe/ZnS quantum dots, a maximum enhancement of 10.4 is achieved due to: increased excitation transition rate, radiative rate, and coupling efficiency of emission to the far field. ..
  18. doi request reprint Optical and excitonic properties of crystalline ZnS nanowires: toward efficient ultraviolet emission at room temperature
    Rui Chen
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
    Nano Lett 10:4956-61. 2010
    ..Finally, the carrier dynamics of the ZnS NWs were measured and analyzed for the first time by ultrafast spectroscopy. ..
  19. doi request reprint Raman spectroscopy of few-quintuple layer topological insulator Bi2Se3 nanoplatelets
    Jun Zhang
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 11:2407-14. 2011
    ..Therefore, a significant reduction in the phonon lifetime of the in-plane vibrational modes is probably due to an enhanced electron–phonon coupling in the few quintuple layer regime...
  20. ncbi request reprint Epitaxial II-VI tripod nanocrystals: a generalization of van der Waals epitaxy for nonplanar polytypic nanoarchitectures
    Muhammad Iqbal Bakti Utama
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    ACS Nano 6:2281-8. 2012
    ....
  21. ncbi request reprint Large-area synthesis of monolayer and few-layer MoSe2 films on SiO2 substrates
    Xin Lu
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 14:2419-25. 2014
    ..Raman and photoluminescence spectroscopy confirm the high quality of as-grown MoSe2 in optics, and electronic transport measurements highlight the potential applications of the sample in nanoelectronics. ..
  22. doi request reprint Laser cooling of a semiconductor by 40 kelvin
    Jun Zhang
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
    Nature 493:504-8. 2013
    ..Our findings suggest that, alternatively, group-II-VI semiconductors with strong exciton-LOP coupling could be harnessed to achieve laser cooling and open the way to optical refrigeration based on semiconductors...
  23. doi request reprint Multiple magnetic mode-based Fano resonance in split-ring resonator/disk nanocavities
    Qing Zhang
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    ACS Nano 7:11071-8. 2013
    ..Furthermore, the coupled structure gives a sensitivity of ∼282 nm/RIU with a figure of merit ∼4. ..
  24. ncbi request reprint Ordered array of gold semishells on TiO2 spheres: an ultrasensitive and recyclable SERS substrate
    Xianglin Li
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
    ACS Appl Mater Interfaces 4:2180-5. 2012
    ..As both the nanosphere lithography and ALD are scalable processes, such 2-D ordered substrates may find applications in chemical sensing...
  25. doi request reprint Interface driven energy filtering of thermoelectric power in spark plasma sintered Bi(2)Te(2.7)Se(0.3) nanoplatelet composites
    Ajay Soni
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
    Nano Lett 12:4305-10. 2012
    ..The results provide a subtle understanding of the grain growth mechanism and the filtering of low energy electrons and phonons with thermoelectric interfaces...
  26. doi request reprint Tailoring the lasing modes in semiconductor nanowire cavities using intrinsic self-absorption
    Xinfeng Liu
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 13:1080-5. 2013
    ..Our straightforward approach is widely applicable in most semiconductor or semiconductor/plasmonic NW cavities...
  27. doi request reprint Laser cooling of CdS nanobelts: thickness matters
    Dehui Li
    Devision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
    Opt Express 21:19302-10. 2013
    ..Based on the thickness dependent photoconductivity gain, mean emission energy and external quantum efficiency, the modeling of the normalized temperature change suggests a good agreement with the experimental results. ..
  28. ncbi request reprint Heteroepitaxial decoration of Ag nanoparticles on Si nanowires: a case study on Raman scattering and mapping
    Zeping Peng
    School of Physical and Mathematical Sciences, Division of Physics and Applied Physics, Nanyang Technological University, Singapore 637371
    Nano Lett 10:3940-7. 2010
    ....
  29. ncbi request reprint Incommensurate van der Waals Epitaxy of Nanowire Arrays: A Case Study with ZnO on Muscovite Mica Substrates
    Muhammad Iqbal Bakti Utama
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    Nano Lett 12:2146-52. 2012
    ..Our findings suggest that the vdWE might be extended for a wider varieties of compounds and epitaxial nanoarchitectures to serve as a universal epitaxy strategy...
  30. doi request reprint Interlayer breathing and shear modes in few-trilayer MoS2 and WSe2
    Yanyuan Zhao
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
    Nano Lett 13:1007-15. 2013
    ....
  31. ncbi request reprint Fluorophore-Doped Core-Multishell Spherical Plasmonic Nanocavities: Resonant Energy Transfer toward a Loss Compensation
    Bo Peng
    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
    ACS Nano 6:6250-9. 2012
    ..Nonradiative transfer rate is increased by more than 3 orders of magnitude at the resonant condition, which is key evidence of the strongest coupling occurring between the plasmon and the gain material...
  32. doi request reprint Assembly of colloidal nanoparticles directed by the microstructures of polycrystalline ice
    Xiaoshuang Shen
    Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 637371
    ACS Nano 5:8426-33. 2011
    ..The unbranched and ultralong plasmonic chains are of importance for future study of plasmonic coupling and development of plasmonic waveguides...
  33. doi request reprint Photoinduced charge transfer within polyaniline-encapsulated quantum dots decorated on graphene
    Kim Truc Nguyen
    Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
    ACS Appl Mater Interfaces 5:8105-10. 2013
    ..The hybrid shows a clear response to the laser irradiation, presenting a great advantage for further applications in optoelectronic devices. ..
  34. doi request reprint The Electrical Detection of Lead Ions Using Gold-Nanoparticle- and DNAzyme-Functionalized Graphene Device
    Yanqin Wen
    School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
    Adv Healthc Mater 2:271-4. 2013
    ..An electronic Pb(2+) sensor, with high sensitivity and specificity, was developed based on DNAzyme- and gold-nanoparticle-functionalized graphene transistor...