Research Topics
 Qihua XiongSummaryAffiliation: Nanyang Technological University Country: Singapore Publications
 Collaborators

Detail Information
Publications
 Transparent freestanding metamaterials and their applications in surfaceenhanced Raman scatteringXinglin Wen
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nanoscale 6:1329. 2014....  Layerbylayer thinning of MoS₂ by thermal annealingXin Lu
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nanoscale 5:89048. 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...  Vertically aligned gold nanorod monolayer on arbitrary substrates: selfassembly and femtomolar detection of food contaminantsBo Peng
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
ACS Nano 7:59936000. 2013..The highly organized vertical arrays generate the reproducible "SERSactive sites" and can be achieved on arbitrary substrates, ranging from silicon, gallium nitride, glass to flexible poly(ethylene naphthalate) substrates. ..  Surface depletion induced quantum confinement in CdS nanobeltsDehui Li
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
ACS Nano 6:528390. 2012..No shift is found at 10 K both with or without PMMA passivation, suggesting a much weaker depletion field due to the freezingout of donors...  Solution phase van der Waals epitaxy of ZnO wire arraysYue Zhu
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nanoscale 5:72429. 2013..We expect our seedless and catalystfree solution phase van der Waals epitaxy synthesis to be widely applicable in other materials and structures. ..  CompositionTunable Vertically Aligned CdS(x) Se(1x) Nanowire Arrays via van der Waals Epitaxy: Investigation of Optical Properties and Photocatalytic BehaviorJun Pan
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Adv Mater 24:41516. 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...  Enhanced thermoelectric properties of solution grown Bi2Te(3x)Se(x) nanoplatelet compositesAjay Soni
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 12:12039. 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...  Highly enhanced exciton recombination rate by strong electronphonon coupling in single ZnTe nanobeltQing Zhang
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 12:64207. 2012..Finally we prove that under high excitation power amplified spontaneous emission (ASE) originating from the electronhole plasma occurs, thereby opening another radiative decay channel with an ultrashort lifetime of few picoseconds...  Electricfielddependent photoconductivity in CdS nanowires and nanobelts: exciton ionization, FranzKeldysh, and Stark effectsDehui Li
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 12:29939. 2012....  Synthesis and optical properties of IIVI 1D nanostructuresMuhammad Iqbal Bakti Utama
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nanoscale 4:142235. 2012..With the steady development of their synthesis, characterization and device fabrication, it is strongly expected that IIVI 1D nanostructures will assume a unique position in future technology...  Flexible visibleinfrared metamaterials and their applications in highly sensitive chemical and biological sensingXinlong Xu
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 11:32328. 2011....  Wavelength tunable single nanowire lasers based on surface plasmon polariton enhanced BursteinMoss effectXinfeng Liu
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 13:533643. 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...  Metamaterialsbased labelfree nanosensor for conformation and affinity biosensingCuong Cao
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
ACS Nano 7:758391. 2013..We further demonstrate the use of the metamaterials for fingerprinting and detection of the arginineglycineglycine domain of nucleolin, a cancer biomarker that specifically binds to a Gquadruplex, with the picomolar sensitivity. ..  Vertically aligned cadmium chalcogenide nanowire arrays on muscovite mica: a demonstration of epitaxial growth strategyMuhammad Iqbal Bakti Utama
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 11:30517. 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...  Recent developments and future directions in the growth of nanostructures by van der Waals epitaxyMuhammad Iqbal Bakti Utama
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nanoscale 5:357088. 2013..With our works, we aim to advocate vdWE as a prospective universal growth strategy for nonplanar epitaxial nanostructures...  Tailoring alphabetical metamaterials in optical frequency: plasmonic coupling, dispersion, and sensingJun Zhang
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
ACS Nano 8:3796806. 2014..Our tunable alphabetical metamaterials provide a generic platform to study the electromagnetic properties of metamaterials and explore the novel applications in optical frequency. ..  Quantum dots on vertically aligned gold nanorod monolayer: plasmon enhanced fluorescenceBo Peng
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nanoscale 6:55928. 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. ..  Optical and excitonic properties of crystalline ZnS nanowires: toward efficient ultraviolet emission at room temperatureRui Chen
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
Nano Lett 10:495661. 2010..Finally, the carrier dynamics of the ZnS NWs were measured and analyzed for the first time by ultrafast spectroscopy. ..  Raman spectroscopy of fewquintuple layer topological insulator Bi2Se3 nanoplateletsJun Zhang
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 11:240714. 2011..Therefore, a significant reduction in the phonon lifetime of the inplane vibrational modes is probably due to an enhanced electron–phonon coupling in the few quintuple layer regime...  Epitaxial IIVI tripod nanocrystals: a generalization of van der Waals epitaxy for nonplanar polytypic nanoarchitecturesMuhammad Iqbal Bakti Utama
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
ACS Nano 6:22818. 2012....  Largearea synthesis of monolayer and fewlayer MoSe2 films on SiO2 substratesXin Lu
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 14:241925. 2014..Raman and photoluminescence spectroscopy confirm the high quality of asgrown MoSe2 in optics, and electronic transport measurements highlight the potential applications of the sample in nanoelectronics. ..  Laser cooling of a semiconductor by 40 kelvinJun Zhang
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
Nature 493:5048. 2013..Our findings suggest that, alternatively, groupIIVI semiconductors with strong excitonLOP coupling could be harnessed to achieve laser cooling and open the way to optical refrigeration based on semiconductors...  Multiple magnetic modebased Fano resonance in splitring resonator/disk nanocavitiesQing Zhang
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
ACS Nano 7:110718. 2013..Furthermore, the coupled structure gives a sensitivity of ∼282 nm/RIU with a figure of merit ∼4. ..  Ordered array of gold semishells on TiO2 spheres: an ultrasensitive and recyclable SERS substrateXianglin Li
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
ACS Appl Mater Interfaces 4:21805. 2012..As both the nanosphere lithography and ALD are scalable processes, such 2D ordered substrates may find applications in chemical sensing...  Interface driven energy filtering of thermoelectric power in spark plasma sintered Bi(2)Te(2.7)Se(0.3) nanoplatelet compositesAjay Soni
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
Nano Lett 12:430510. 2012..The results provide a subtle understanding of the grain growth mechanism and the filtering of low energy electrons and phonons with thermoelectric interfaces...  Tailoring the lasing modes in semiconductor nanowire cavities using intrinsic selfabsorptionXinfeng Liu
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 13:10805. 2013..Our straightforward approach is widely applicable in most semiconductor or semiconductor/plasmonic NW cavities...  Laser cooling of CdS nanobelts: thickness mattersDehui Li
Devision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
Opt Express 21:1930210. 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. ..  Heteroepitaxial decoration of Ag nanoparticles on Si nanowires: a case study on Raman scattering and mappingZeping Peng
School of Physical and Mathematical Sciences, Division of Physics and Applied Physics, Nanyang Technological University, Singapore 637371
Nano Lett 10:39407. 2010....  Incommensurate van der Waals Epitaxy of Nanowire Arrays: A Case Study with ZnO on Muscovite Mica SubstratesMuhammad Iqbal Bakti Utama
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
Nano Lett 12:214652. 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...  Interlayer breathing and shear modes in fewtrilayer MoS2 and WSe2Yanyuan Zhao
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
Nano Lett 13:100715. 2013....  FluorophoreDoped CoreMultishell Spherical Plasmonic Nanocavities: Resonant Energy Transfer toward a Loss CompensationBo Peng
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
ACS Nano 6:62509. 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...  Assembly of colloidal nanoparticles directed by the microstructures of polycrystalline iceXiaoshuang Shen
Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 637371
ACS Nano 5:842633. 2011..The unbranched and ultralong plasmonic chains are of importance for future study of plasmonic coupling and development of plasmonic waveguides...  Photoinduced charge transfer within polyanilineencapsulated quantum dots decorated on grapheneKim 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 5:810510. 2013..The hybrid shows a clear response to the laser irradiation, presenting a great advantage for further applications in optoelectronic devices. ..  The Electrical Detection of Lead Ions Using GoldNanoparticle and DNAzymeFunctionalized Graphene DeviceYanqin Wen
School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
Adv Healthc Mater 2:2714. 2013..An electronic Pb(2+) sensor, with high sensitivity and specificity, was developed based on DNAzyme and goldnanoparticlefunctionalized graphene transistor...