Yayınlar & Eserler

Yayın Ağı

SCI, SSCI ve AHCI İndekslerine Giren Dergilerde Yayınlanan Makaleler

Perylene diimide-derived supramolecules-modified graphene sponge as a high-efficiency solar steam generator

ERÇARIKCI E., Demirci Gültekin D., TOPÇU E., Kudaş Z., ALANYALIOĞLU M., DAĞCI KIRANŞAN K.
Desalination , cilt.593, 2025 (SCI-Expanded) identifier

Supramolecular Modification of Graphene Sponge with a Porphyrin Derivative Enhances the Photothermal Conversion Efficiency of a Solar Steam Generator

Erçarıkcı E., Demirci Gültekin D., Topçu E., Kudaş Z., Alanyalıoğlu M., Dağcı Kıranşan K.
ACS Applied Materials and Interfaces , cilt.16, sa.45, ss.61910-61920, 2024 (SCI-Expanded) Sürdürülebilir Kalkınma identifier identifier

Paracetamol sensing with a flexible graphene paper electrode modified with MnCo2O4

Shafiyev M., Erçarıkcı E., Dağcı Kıranşan K., Topçu E.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY , cilt.99, sa.12, ss.2582-2591, 2024 (SCI-Expanded) identifier identifier

An effective material for solar steam generation applications: Gradient graphene sponge

Erçarıkcı E., Topçu E., Kudaş Z., Aksu Z., Alanyalıoğlu M., Dağcı Kıranşan K.
Materials Today Sustainability , cilt.26, sa.26, ss.100701, 2024 (SCI-Expanded) identifier identifier

Three-dimensional FeNiP decorated graphene sponge: A novel flexible electrode for high-performance asymmetric supercapacitor

Erçarıkcı E., Topçu E., Dağcı Kıranşan K.
Materials Research Bulletin , cilt.165, 2023 (SCI-Expanded) identifier identifier

Design and synthesis of a MnCo-MOF modified flexible 3D graphene sponge electrode for an asymmetric supercapacitor with high power and energy density

Erçarıkcı E., Topçu E., Dağcı Kıranşan K.
JOURNAL OF MATERIALS CHEMISTRY C , cilt.11, sa.11, ss.9593-9601, 2023 (SCI-Expanded) identifier identifier

A Flexible Graphene Paper Electrochemical Sensor With Electrodeposited Ag and Ni Nanoparticles for H2O2 Detection

Erçarıkcı E., Kiransan K., Topçu E.
IEEE SENSORS JOURNAL , cilt.23, sa.7, ss.7087-7094, 2023 (SCI-Expanded) Sürdürülebilir Kalkınma identifier identifier

Flexible supercapacitor electrodes based on modified binary metal phosphites on three dimensional graphene sponge

Erçarıkcı E., Topçu E., Dağcı Kıranşan K.
JOURNAL OF ALLOYS AND COMPOUNDS , cilt.930, 2023 (SCI-Expanded) identifier identifier

Design of metal phosphite decorated sponge materials for high-performance flexible battery-type supercapacitors

Erçarıkcı E., Aksu Z., Topçu E., Dağcı Kıranşan K.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH , cilt.46, sa.15, ss.21661-21678, 2022 (SCI-Expanded) Creative Commons License identifier identifier

Three-Dimensional ZnCo-MOF Modified Graphene Sponge: Flexible Electrode Material for Symmetric Supercapacitor

ERÇARIKCI E., DAĞCI KIRANŞAN K., TOPÇU E.
ENERGY & FUELS , cilt.36, sa.3, ss.1735-1745, 2022 (SCI-Expanded) identifier identifier

Graphene paper with electrodeposited NiCo2S4 nanoparticles as a novel flexible sensor for simultaneous detection of folic acid and ascorbic acid

ERÇARIKCI E., Aksu Z., DAĞCI KIRANŞAN K., TOPÇU E.
DIAMOND AND RELATED MATERIALS , cilt.121, 2022 (SCI-Expanded) identifier identifier

ZnS Nanoparticles-decorated Composite Graphene Paper: A Novel Flexible Electrochemical Sensor for Detection of Dopamine

Erçarıkcı E., Aksu Z., Topçu E., Dağcı Kıranşan K.
ELECTROANALYSIS , cilt.34, sa.1, ss.91-102, 2022 (SCI-Expanded) Sürdürülebilir Kalkınma identifier identifier

SnS2-gC(3)N(4)/rGO Composite Paper as an Electrode for High-Performance Flexible Symmetric Supercapacitors

Dağcı Kıranşan K., Topçu E.
SYNTHETIC METALS , cilt.264, 2020 (SCI-Expanded) Creative Commons License identifier identifier

Conducting Polymer-Reduced Graphene Oxide Sponge Electrode for Electrochemical Detection Based on DNA Hybridization

Dağcı Kıranşan K., Topçu E.
ACS APPLIED NANO MATERIALS , cilt.3, sa.6, ss.5449-5462, 2020 (SCI-Expanded) Creative Commons License identifier identifier

Electrochemical simultaneous sensing of melatonin and ascorbic acid at a novel flexible B-RGO composite paper electrode

Topçu E., Dağcı Kıranşan K.
DIAMOND AND RELATED MATERIALS , cilt.105, 2020 (SCI-Expanded) Creative Commons License identifier identifier

Three-dimensional, free-standing, and flexible cobalt-based metal-organic frameworks/graphene composite paper: A novel electrochemical sensor for determination of resorcinol

Topçu E.
MATERIALS RESEARCH BULLETIN , cilt.121, 2020 (SCI-Expanded) identifier identifier

Graphene Paper with Sharp-edged Nanorods of Fe-CuMOF as an Excellent Electrode for the Simultaneous Detection of Catechol and Resorcinol

Dağcı Kıranşan K., Topçu E.
ELECTROANALYSIS , cilt.31, sa.12, ss.2518-2529, 2019 (SCI-Expanded) identifier identifier

Flexible gold nanoparticles/rGO and thin film/rGO papers: novel electrocatalysts for hydrogen evolution reaction

Topçu E., Dağcı Kıranşan K.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY , cilt.94, sa.12, ss.3895-3904, 2019 (SCI-Expanded) Sürdürülebilir Kalkınma identifier identifier

Flexible and freestanding catalase-Fe3O4/reduced graphene oxide paper: Enzymatic hydrogen peroxide sensor applications

Kiransan K., Aksoy M., Topçu E.
Materials Research Bulletin , cilt.106, ss.57-65, 2018 (SCI-Expanded) identifier identifier

Flexible and Free-standing PtNLs-MoS2/Reduced Graphene Oxide Composite Paper: A High-Performance Rolled Paper Catalyst for Hydrogen Evolution Reaction

Topçu E., Kiransan K.
ChemistrySelect , cilt.3, sa.21, ss.5941-5949, 2018 (SCI-Expanded) identifier identifier

Free-standing and Flexible MoS2/rGO Paper Electrode for Amperometric Detection of Folic Acid

Kiransan K., Topçu E.
Electroanalysis , cilt.30, sa.5, ss.810-818, 2018 (SCI-Expanded) Sürdürülebilir Kalkınma identifier identifier

Surface-confined electropolymerization of pyronin Y in the graphene composite paper structure for the amperometric determination of dopamine

Kıranşan K., Topçu E., Alanyalıoğlu M.
JOURNAL OF APPLIED POLYMER SCIENCE , cilt.134, sa.30, 2017 (SCI-Expanded) identifier identifier

Free-standing Graphene/Poly(methylene blue)/AgNPs Composite Paper for Electrochemical Sensing of NADH

Topçu E., Dagcı K., Alanyalıoğlu M.
Electroanalysis , cilt.28, sa.9, ss.2058-2069, 2016 (SCI-Expanded) identifier identifier

Electrochemical Formation of Poly(thionine) Thin Films: The Effect of Amine Group on the Polymeric Film Formation of Phenothiazine Dyes

TOPÇU E., ALANYALIOĞLU M.
JOURNAL OF APPLIED POLYMER SCIENCE , cilt.131, sa.1, 2014 (SCI-Expanded) identifier identifier

Electrochemical preparation of poly(methylene blue)/graphene nanocomposite thin films

Erçarıkcı E., Dagcı K., Topçu E., Alanyalıoğlu M.
Materials Research Bulletin , cilt.55, ss.95-101, 2014 (SCI-Expanded) identifier identifier

Diğer Dergilerde Yayınlanan Makaleler

Ag NPs-SnO2/İndirgenmiş Grafen Oksit Kağıt: Süperkapasitör için Esnek Elektrot Materyali Üretimi

Erçarıkcı E., Dağcı Kıranşan K., Topçu E.
Avrupa Bilim ve Teknoloji Dergisi , cilt.32, ss.721-727, 2021 (Hakemli Dergi)

P-nitrofenol’ün elektrokimyasal yöntemle belirlenmesi için esnek ve müstakil PtCu ile modifiye edilmiş grafen esaslı kağıt

Dağcı Kıranşan K., Topçu E.
Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi , cilt.11, sa.1, ss.147-160, 2021 (Hakemli Dergi) Creative Commons License

Preparation and characterization of self-standing and flexible CuS/rGO composite paper

Topçu E., Dağcı Kıranşan K.
Turkish Journal of Analytical Chemistry , cilt.2, sa.1, ss.1-6, 2020 (Hakemli Dergi) Creative Commons License

Serbest Duran ve Esnek MnO2/Grafen Kağıt Elektrot: Dopamin Tayini İçin Yeni Tip Amperometrik Sensör

Topçu E.
Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi , cilt.10, sa.1, ss.22-34, 2020 (Hakemli Dergi) Creative Commons License

Hakemli Kongre / Sempozyum Bildiri Kitaplarında Yer Alan Yayınlar

Supramolecules Modified Gradient Graphene Sponge Material for SolarSteam Generators

Dağcı Kıranşan K., Erçarıkcı E., Topçu E.
6th INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIENCES ANTALYA, TURKEY ICOLES 2023, Antalya, Türkiye, 2 - 05 Kasım 2023, ss.31

A Flexible Graphene Paper with Ag and Ni Nanoparticles for H2O2Detection

Topçu E., Erçarıkcı E., Dağcı Kıranşan K.
6th INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIENCES ANTALYA, TURKEY ICOLES 2023, Antalya, Türkiye, 2 - 05 Kasım 2023, ss.98-109

Fabrication of MOF-derived Fe2O3 Nanoparticles-decorated CompositeReduced Graphene Oxide Paper Electrode

Erçarıkcı E., Dağcı Kıranşan K., Topçu E.
6th INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIENCES ANTALYA, TURKEY ICOLES 2023, Antalya, Türkiye, 2 - 05 Kasım 2023, ss.40

MOF-containing Graphene Sponge Design for Sustainable Water Purification System Applications

KARAKAŞ A., DAĞCI KIRANŞAN K., ERÇARIKCI E., TOPÇU E.
6th INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIENCES ANTALYA, TURKEY ICOLES 2023, 2 - 05 Kasım 2023

Preparation and Characterization of MnCo2O4 Modified Flexible GraphenePaper

Shafıyev M., Topçu E., Erçarıkcı E., Dağcı Kıranşan K.
6th INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIENCES ANTALYA, TURKEY ICOLES 2023, Antalya, Türkiye, 2 - 05 Kasım 2023, ss.10-23

Ni AND Ag NANOPARTICLES DECORATED FLEXIBLE GRAPHENE PAPERS: THE COMPARISON OF TWO ELECTRODES FOR ELECTROCHEMICAL DETERMINATION OF H2O2

Topçu E., Erçarıkcı E., Dağcı Kıranşan K.
INTERNATIONAL AEGEAN CONFERENCES ON NATURAL & MEDICAL SCIENCES-V, İzmir, Türkiye, 20 - 22 Aralık 2022, ss.118-119

Design of Ultralight FeCoP or FeZnP/Graphene Sponge Asymmetric Supercapacitor Electrodes

ERÇARIKCI E., DAĞCI KIRANŞAN K., TOPÇU E.
4th International Eurasian Conference on Science, Engineering and Technology, 14 Aralık 2022

Fabrication of Flexible ZnP/Graphene Sponge Material

Aksu Z., Erçarıkcı E., Dağcı Kıranşan K., Topçu E.
13th Chemical Physics Congress, Elazığ, Türkiye, 7 - 08 Ekim 2022, ss.101-102

Ultralight and Flexible FeZnP/Graphene Sponge

Erçarıkcı E., Dağcı Kıranşan K., Topçu E.
13th Chemical Physics Congress, Elazığ, Türkiye, 7 - 08 Ekim 2022, ss.99-100

A Flexible Freestanding Ag Nanoparticles Decorated Graphene Paper Electrode for Electrochemical Determination of H2O2

TOPÇU E., ERÇARIKCI E., DAĞCI KIRANŞAN K.
5. International Conference on Life and Engineering Sciences, 19 Mayıs 2022

Gradient Graphene Sponge Material Design for Solar Steam Generators

DAĞCI KIRANŞAN K., ERÇARIKCI E., TOPÇU E., AKSU Z.
5. INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIENCES, 19 Mayıs 2022

Fabrication of Flexible FeP/Graphene Sponge Material for Asymmetric Supercapacitor

AKSU Z., ERÇARIKCI E., DAĞCI KIRANŞAN K., TOPÇU E.
5. INTERNATIONAL CONFERENCE ON LIFE AND ENGINEERING SCIENCES, 19 Mayıs 2022

Binary Metal Phosphite/Graphene Sponge: 3D Flexible Electrode for High-Performance Asymmetric Supercapacitor

Erçarıkcı E., Dağcı Kıranşan K., Topçu E.
5. International Conference on Life and Engineering Sciences (ICOLES 2022), Antalya, Türkiye, 19 Mayıs 2022, ss.1-3

Flexible and Ultralight CoZn-MOF/Reduced Graphene Oxide Sponge

Erçarıkcı E., Dağcı Kıranşan K., Topçu E.
5th INTERNATIONAL CONFERENCE ON ADVANCES IN NATURAL & APPLIED SCIENCE AGRICULTURE, Ağrı, Türkiye, 21 - 23 Eylül 2021, ss.228-235

ZnS Nanopartikül Katkılı Kompozit Grafen Kağıt: Seçici Dopamin Tayini İçin Yeni Bir Esnek Elektrokimyasal Sensör

Erçarıkcı E., Aksu Z., Topçu E., Dağcı Kıranşan K.
33. Ulusal Kimya Kongresi, İstanbul, Türkiye, 7 - 09 Ekim 2021, ss.91

PRODUCTION OF FLEXIBLE NiCo2S4/rGO NANOCOMPOSITE PAPER MATERIALS

Erçarıkcı E., Dağcı Kıranşan K., Topçu E., Aksu Z.
International Symposium on Applied Sciences and Engineering, Erzurum, Türkiye, 7 - 09 Nisan 2021, ss.346-348

Üç Boyutlu ve Esnek PEDOT:PSS/rGO Sünger Materyalin Hazırlanması ve Karakterizasyonu

Dağcı Kıranşan K., Topçu E.
32. Ulusal Kimya Kongresi, Eskişehir, Türkiye, 17 - 19 Eylül 2020 Creative Commons License

3D, Flexible, and Free-standing Sponge Electrode for Electrochemical Detection with Methylene Blue Indicator Based on Hybridization of DNA

Dağcı Kıranşan K., Topçu E.
2nd International Eurasian Conference onScience, Engineering and Technology (EurasianSciEnTech 2020), Gaziantep, Türkiye, 7 - 09 Ekim 2020 Creative Commons License

CONDUCTING PEDOT:PSS-REDUCED GRAPHENE OXIDE SPONGE ELECTRODE FOR ELECTROCHEMICAL DETECTION BASED ON DNA HYBRIDIZATION

Dağcı Kıranşan K., Topçu E.
3rd International Conference on Physical Chemistry and Functional Materials (PCFM-2020), Malatya, Türkiye, 22 - 24 Eylül 2020 Creative Commons License

NiCu/Graphene Oxide Paper for Removal of Safranin Dye from Aqueous Solutions by Adsorption: A Facile Green Approach

TOPÇU E.
3rd International Conference on Advanced Engineering Technologies, 19 - 21 Eylül 2019

Hidrojen Evrim Reaksiyonları için Esnek bir Elektrokatalizör: Altın ince film kağlı rGO kağıt

TOPÇU E., DAĞCI KIRANŞAN K.
31. Ulusal Kimya Kongresi, Türkiye, 10 - 13 Eylül 2019

Yüksek Mekanik, Elektronik ve Esneklik Özelliklerine Sahip AgNi Alaşım Filmi ile Modifiye Edilmiş rGO Kağıt Materyaller

TOPÇU E.
31.Ulusal Kimya Kongresi, Türkiye, 10 - 13 Eylül 2019

Flexible Gold Nanoparticles/Rgo Paper as Novel Electrocatalyst for Hydrogen Evolution Reactıon

Topçu E., Dağcı Kıranşan K.
2nd Internatıonal Conference on Physical Chemistry and Functional Materials, Nevşehir, Türkiye, 25 - 27 Haziran 2019, ss.320-325 Creative Commons License

FABRICATION AND CHARACTERIZATION OF ZINC NANOPARTICLES DECORATED REDUCED GRAPHENE OXIDE PAPER

TOPÇU E.
International Conference on Physical Chemistry and Functional Materials (PCFM19), 25 - 27 Haziran 2019

Characterization and Application of Composite Graphene Papers Prepared in Different Compositions

DAĞCI KIRANŞAN K., TOPÇU E.
2nd International Congress on Semiconductor Materials and Devices, 28 - 30 Ağustos 2018

Porous Gold Film Loaded on Flexible Reduced Graphene Oxide Paper Prepared by Electrodeposition

TOPÇU E., DAĞCI KIRANŞAN K.
14th Nanoscience andNanotechnology Conference of Turkey (NANOTR-14 www.nanotr14.org), Antalya, Türkiye, 22 - 25 Eylül 2018, ss.42

Characterization and Applications of Composite Graphene Papers Prepared in Different Compositions

DAĞCI KIRANŞAN K., TOPÇU E.
International Conferance on Semiconductor Materials and Devices (ICSMD) and Functional Materials, Ardahan, Türkiye, 28 - 30 Ağustos 2018, ss.42

Fabrication and Characterization of Gold Nanoparticles Decorated Reduced Graphene Oxide Paper

TOPÇU E., DAĞCI KIRANŞAN K.
International Conference on Physical Chemistry and Functional Materials (PCFM’18), 19 - 21 Haziran 2018

Flexible and Free-Standing Graphene Oxide Paper Decorated with Metal Organic Frameworks

DAĞCI KIRANŞAN K., TOPÇU E.
International Conference on Physical Chemistry and Functional Materials (PCFM’18), 19 - 21 Haziran 2018

Free-Standing and Flexible MoS2/rGO Paper Electrode for Amperometric Dedection of Folic Acid

DAĞCI KIRANŞAN K., TOPÇU E.
13. Nanoscience and Nanotechnology Conference, 22 - 25 Ekim 2017

Characterization and Preparation Free-Standing and Flexible Pt-MoS2/rGO Paper Electrode for Hydrogen Evolution Reaction

DAĞCI KIRANŞAN K., TOPÇU E., Erçarıkcı e.
ANCON, 5 - 07 Ekim 2017

Free-standing Graphene-Based Papers for Electrochemical Sensor Applications

DAĞCI KIRANŞAN K., TOPÇU E., AKSU Z., ALANYALIOĞLU M.
Matrafüred 2017, 11 - 16 Haziran 2017

FLEXIBLE AND FREESTANDING CATALASE-Fe3O4/REDUCED GRAPHENE OXIDE HYBRIDE PAPER: ENZYMATIC HYDROGEN PEROXIDE SENSOR APPLICATIONS

DAĞCI KIRANŞAN K., AKSOY M., TOPÇU E.
International DNA Day and Genom Congress, 24 - 28 Nisan 2017

Flexible and Electrically Conductive Fe3O4 rGO Paper Electrode and Its Catalytical Application

DAGCI K., TOPÇU E., AKSOY M., ALANYALIOĞLU M.
Graphene Turkey, 20 - 21 Ekim 2016

FABRICATION and AMPEROMETRIC SENSOR APPLICATION of FREE STANDING GRAPHENE PAPER ELECTRODES DECORATED with DYE POLYMERS

DAĞCI KIRANŞAN K., TOPÇU E., ALANYALIOĞLU M.
INTERNATIONAL WORKSHOP ON SPECIALTOPICS ON POLYMERIC COMPOSITES, 24 - 26 Şubat 2016

A sensitive NADH biosensor based on flexible and free standing graphene poly MB AgNPs paper

TOPÇU E., ERÇARIKCI E., Bayındır O., DAĞCI KIRANŞAN K., ALANYALIOĞLU M.
ICREA Workshop on Graphene Nanobiosensors, 25 Mart 2015

ROLE OF PREPARATION PROCEDURE OF GRAPHENE ON THE ELECTROCHEMICAL PERFORMANCE OF FREE STANDING GRAPHENE METHYLENE BLUE SILVER NANOPARTICLE COMPOSITE ELECTRODES

TOPÇU E., Bayındır O., ERÇARIKCI E., DAĞCI KIRANŞAN K., Öztürk A., ALANYALIOĞLU M.
NANOCON 2014, Brno, Çek Cumhuriyeti, 5 - 07 Kasım 2014, ss.102

Preparation Of Highly Conductive, Flexible, And Free-standing Graphene Composite Paper

TOPÇU E., DAĞCI KIRANŞAN K., ERÇARIKCI E., Öztürk A., ALANYALIOĞLU M.
Nanotr-10, 17 Haziran 2014

Cooperative Effect Of Poly(methylene Blue) And Graphene On The Electrocatalytic Oxidation Of Nitrite

ERÇARIKCI E., DAĞCI KIRANŞAN K., TOPÇU E., Bayındır O., ALANYALIOĞLU M.
10th International Electrochemistry Meeting, 04 Eylül 2013

ELECTROCHEMICAL SYNTHESIS OF HIGHLY ORIENTED TERNARY SEMICONDUTIVE PbSeS THIN FILMS

Demir Ş. B., Üst Ü. Ç., DAĞCI K., TOPÇU E., Erçarıkçı E., ALANYALIOĞLU M.
NANO-TR 9, Erzurum, Türkiye, 24 - 28 Haziran 2013

Electrochemical Preparation Of Graphene/poly(methylene Blue) Nanocomposite Thin Films

ERÇARIKCI E., TOPÇU E., DAĞCI KIRANŞAN K., ALANYALIOĞLU M., Pastor N. C.
Nanotechitaly 2012, 21 Kasım 2012

GRAFEN POLY(METİLEN MAVİSİ) NANOKOMPOZİT YAPILARININ ELEKTROKİMYASAL SENTEZİ

ERÇARIKCI E., TOPÇU E., DAĞCI KIRANŞAN K., ALANYALIOĞLU M.
6. ULUSAL ANALİTİK KİMYA KONGRESİ, Türkiye, 3 - 07 Eylül 2012

Surface confined electropolymerization of methylene blue monolayers

DAĞCI KIRANŞAN K., Kaplan İ. H., Kalyoncu E., TOPÇU E., ALANYALIOĞLU M.
25. Ulusal Kimya Kongresi, Türkiye, 27 Haziran - 02 Temmuz 2011

Investigation of nucleation and growth mechanism during formation of poly azure A

Kalyoncu E., DAĞCI KIRANŞAN K., Kaplan İ. H., TOPÇU E., ALANYALIOĞLU M.
Nano-TR-6, 15 - 18 Haziran 2010

Effect of surfactants on the formation of poly azure A thin films

Kalyoncu E., DAĞCI KIRANŞAN K., TOPÇU E., Kaplan İ. H., ALANYALIOĞLU M.
5. Analitik Kimya Kongresi, Türkiye, 21 - 25 Haziran 2010

Metrikler

Yayın

78

Atıf (WoS)

432

H-İndeks (WoS)

14

Atıf (Scopus)

500

H-İndeks (Scopus)

16

Proje

16

Tez Danışmanlığı

1

Açık Erişim

8
BM Sürdürülebilir Kalkınma Amaçları