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| 1 | Structural and luminescence enhancement properties of Eu^(3+)/Ag nanocrystallites doped SiO_2-TiO_2 matrices显示文摘We reported here the structural and optical characterisation of silver nanocrystallites/Eu3+ :SiO2-TiO2 matrices synthesised through sol-gel route. Structural characterisations were done by using energy dispersive spectroscopy (EDX), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), atomic force microscope (AFM) and transmission electron microscopy (TEM) measurements and optical characterisations were performed by absorption and emission spectroscopy. The TEM and XRD measurements confirmed the presence of nanocrystals. A broad absorption band was observed due to surface plasmon resonance of silver nanocrystals. The effect of silver nanocrystals on the emission spectrum of Eu3+ doped SiO2-TiO2 matrices was discussed. An attempt was made to explain this fluorescence enhancement by invoking phenomena such as energy transfer, asymmetry ratio, surface plasmon, surface roughness, crystallinity and grain boundary. Our analysis, based on the experimental results, suggested that all the phenomena except crystallinity and grain boundary had favourable effects on fluorescence enhancement. We also estimated the relevant parameters associated with the phenomena that affected the fluorescence emission from the Eu3+ ions in the matrix. It was seen that the theoretical estimate of fluorescence enhancement agreed well with the experimental estimate. | Arun Kumar K V Revathy K P Prathibha Vasudevan Sunil Thomas Biju P R Unnikrishnan N V | 2013 | Journal of Rare Earths2013，31，5： | 2 |
| 2 | an XPS study of the effect of ZDDP on the AW/EP characteristics of molybdenum based additives 显示文摘 | Unnikrishnan R Jain M C Additive-additive interaction: Harinarayan A K | 2002 | Wear2002，252，3： | 1 |
| 3 | Tumor reducing and anticarcinagenic activity of selected spices显示文摘 | R Kuttan | 1990 | Cancer Letters1990，，51： | 1 |
| 4 | Risk factors for microvascular complications of diabetes among South Indian subjects with type 2 diabetes-the Chennai Urban Rural Epi- demiology Study(CURES) Eye Study-5显示文摘 | Pradeepa R Anjana RM Unnikrishnan R | 2010 | Diabetes Technol Ther2010，12，10： | 1 |
| 5 | Additiveadditive interaction: an XPS study of the effect of ZDDP on the AW/EP characteristics of molybdenum based additives 显示文摘 | Unnikrishnan R Jain M C Harinarayan A K | 2002 | Wear2002，252，： | 1 |
| 6 | Anesthetic management for a hypertensive patent ductus arteriosus (PDA) closure in a patient with surgically uncorrectable long segment right pulmonary artery hypoplasia and a vemricular septal defect 显示文摘 | Neema P K Unnikrishnan M Sinha P K Rathod R C | 2003 | J Cardiothorac Vasc Anesth2003，17，： | 1 |
| 7 | Toward objective evaluation of image segmentation algorithms显示文摘 | Unnikrishnan R Pantofaru C Hebert M | 2007 | IEEE Transactions on Pattern Analysis and Machine Intelligence2007，29，6： | 1 |
| 8 | Macroscopic synthesis and characterization of giant fullerenes 显示文摘 | Selvan R Unnikrishnan R Ganapathy S | 2000 | Chem Phys Lett2000，316，34： | 1 |
| 9 | Additive-additive interaction:An XPS study of the effect of ZDDP on the AW/EP characteristics of molybdenum based additives显示文摘 | UNNIKRISHNAN R JAIN M C HARINARAYAN A K | 2002 | Wear2002，252，34： | 1 |
| 10 | Additive-additive interaction: An XPS study of the effect of ZDDP on the AW/EP characteristics of molybdenum based additives显示文摘 | UNNIKRISHNAN R JAIN M C HARINARAYAN A K | 2002 | Wear2002，252，34： | 1 |
| 11 | Comprehensive Evaluation of Adherence to Therapy, Its Associations, and Its Implications in Patients With Chronic Myeloid Leukemia Receiving Imatinib 显示文摘 | Unnikrishnan R Veeraiah S Mani S | 2016 | Clin Lymphoma Myeloma Leuk2016，16，6： | 1 |
| 12 | Metal containing layered double hydroxides as efficient catalyst precursors for the selective conversion of acetone 显示文摘 | Unnikrishnan R Narayanan S | 1999 | J Mole Catal1999，144，： | 1 |
| 13 | Sea level changes along the Indian Coast:observation and projections显示文摘 | UNNIKRISHNAN A S KUMAR K R FERNANDES S E | 2006 | Current Science2006，90，3： | 1 |
| 14 | A Measure for Objective Evaluation of Image Segmentation Algorithms显示文摘 | Unnikrishnan R Pantofaru C Hebert M | 2005 | Computer Vision and Pattern Recognition2005，3，： | 1 |
| 15 | Behavior of Reinforced Clay Under Monotonic and Cyclic Loading 显示文摘 | UNNIKRISHNAN N RAJAGOPAL K KRISH-NASWAMY N R | 2002 | Geotextiles and Geomembranes2002，20，2： | 1 |
| 16 | Applications of fractional Fourier transform in sonar processing 显示文摘 | Jacob R Thomas T Unnikrishnan A | 2009 | IETE Journal of Research2009，55，1： | 1 |
| 17 | Ratiocinative Approach to Ignition Transient Modeling in Solid Rockets显示文摘 | Sanal Kumar V R Unnikrishnan C | 2004 | AIAA2004，4056，： | 1 |
| 18 | Swelling and solubility behaviour of parboiled rice flour显示文摘 | Unnikrishnan K R Bhattacharya K R | 1981 | Journal Food Technology1981，16，： | 1 |
| 19 | Additive-additive interaction : an XPS study of the effect of ZDDP on the AW/EP characteristics of molybdenum based additives 显示文摘 | Unnikrishnan R Jain M C Harinarayan A K | 2002 | Wear2002，252，34： | 1 |
| 20 | Additive-additive interaction:an XPS study of the effect of ZDDP on the AW/EP characteristics of molybdenum based additives显示文摘 | Unnikrishnan R Jain M C Harinarayan A K | 2002 | Wear2002，252，： | 1 |
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