Journal ArticleDOI
Direct Observation of Quantum‐Confined Graphene‐Like States and Novel Hybrid States in Graphene Oxide by Transient Spectroscopy
Lei Wang,Hai-Yu Wang,Yan Wang,Shoujun Zhu,Yong-Lai Zhang,Junhu Zhang,Qi-Dai Chen,Wei Han,Huailiang Xu,Bai Yang,Hong-Bo Sun +10 more
TLDR
An unexpected novel hybrid state arising from amorphous carbon-like peripheral structure with high sp(3) /sp(2) carbon ratio in close vicinity of confined graphene-like states is found commonly existent in various carbon nanomaterials, including graphene oxide, graphene quantum dots, and carbon dots.Abstract:
Quantum-confined graphene-like electronic states are directly observed in graphene oxide and photothermally reduced graphene oxide via transient spectroscopy. An unexpected novel hybrid state arising from amorphous carbon-like peripheral structure with high sp(3) /sp(2) carbon ratio in close vicinity of confined graphene-like states is found commonly existent in various carbon nanomaterials, including graphene oxide, graphene quantum dots, and carbon dots.read more
Citations
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The photoluminescence mechanism in carbon dots (graphene quantum dots, carbon nanodots, and polymer dots): current state and future perspective
TL;DR: The actual mechanism of photoluminescence (PL) of fluorescent carbon dots (CDs) is still an open debate among researchers as mentioned in this paper, and three types of fluorescent CDs were involved: graphene quantum dots (GQDs), carbon nanodots (CNDs), and polymer dots (PDs).
Journal ArticleDOI
Common Origin of Green Luminescence in Carbon Nanodots and Graphene Quantum Dots
Lei Wang,Shoujun Zhu,Hai-Yu Wang,Song-Nan Qu,Yong-Lai Zhang,Junhu Zhang,Qi-Dai Chen,Huailiang Xu,Wei Han,Bai Yang,Hong-Bo Sun +10 more
TL;DR: In this article, a common origin of green luminescence in carbon nanodots and GQDs is unraveled by ultrafast spectroscopy, according to the change of surface functional groups during surface chemical reduction experiments, which are also accompanied by obvious emission-type transform.
Journal ArticleDOI
Smart Utilization of Carbon Dots in Semiconductor Photocatalysis.
TL;DR: Carbon dots have emerged as a promising new class of metal-free photocatalyst, displaying semiconductor-like photoelectric properties and showing excellent performance in a wide variety of photoelectrochemical and photocatalytic applications owing to their ease of synthesis.
Journal ArticleDOI
Tailoring color emissions from N-doped graphene quantum dots for bioimaging applications
TL;DR: Wang et al. as discussed by the authors reported N-doped GQDs with tailored single color emission by tuning π-conjugation degree, which is comparable to the inorganic quantum dot.
Journal ArticleDOI
The crosslink enhanced emission (CEE) in non-conjugated polymer dots: from the photoluminescence mechanism to the cellular uptake mechanism and internalization.
Shoujun Zhu,Lei Wang,Nan Zhou,Xiaohuan Zhao,Yubin Song,Suraj Maharjan,Junhu Zhang,Laijin Lu,Hai-Yu Wang,Bai Yang +9 more
TL;DR: The crosslink enhanced emission (CEE) in a new type of non-conjugated polymer dots (PDs) is proved and originates from the decreased vibration and rotation of amino-based chromophores.
References
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Journal ArticleDOI
Transparent, Conductive Graphene Electrodes for Dye-Sensitized Solar Cells
TL;DR: Transparent, conductive, and ultrathin graphene films, as an alternative to the ubiquitously employed metal oxides window electrodes for solid-state dye-sensitized solar cells, are demonstrated and show high chemical and thermal stabilities and an ultrasmooth surface with tunable wettability.
Journal ArticleDOI
Recent advances in graphene based polymer composites
TL;DR: In this paper, the structure, preparation and properties of polymer/graphene nanocomposites are discussed in general along with detailed examples drawn from the scientific literature, and the percolation threshold can be achieved at a very lower filler loading.
Journal ArticleDOI
Graphene oxide as a chemically tunable platform for optical applications
TL;DR: This Review highlights the recent advances in optical properties of chemically derived GO, as well as new physical and biological applications that are attracting chemists for its own characteristics.
Journal ArticleDOI
Graphene oxide: preparation, functionalization, and electrochemical applications.
Da Chen,Hongbin Feng,Jinghong Li +2 more
Journal ArticleDOI
Electronic Transport Properties of Individual Chemically Reduced Graphene Oxide Sheets
Cristina Gómez-Navarro,R. Thomas Weitz,Alexander M. Bittner,Matteo Scolari,Alf Mews,Marko Burghard,Klaus Kern +6 more
TL;DR: Comparison of multilayered sheets revealed that the conductivity of the undermost layer is reduced by a factor of more than 2 as a consequence of the interaction with the Si/SiO2 substrate.
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